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Question 1
Incorrect
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A 40-year-old woman comes in for a check-up. She has recently noticed several areas of 'pale skin' on her hands. Despite using an emollient and topical hydrocortisone, there has been no improvement. During the examination, you observe multiple depigmented patches on the back of both hands. The patient's medical history includes a previous diagnosis of thyrotoxicosis, for which she is currently taking carbimazole and thyroxine.
What could be the probable reason behind her symptoms?Your Answer: Addison disease
Correct Answer: Vitiligo
Explanation:Patients with autoimmune conditions like thyrotoxicosis are more likely to have vitiligo, but there are no other indications in the medical history that point towards Addison’s disease.
Understanding Vitiligo
Vitiligo is a medical condition that occurs when the immune system attacks and destroys melanocytes, leading to the loss of skin pigmentation. It is estimated to affect about 1% of the population, with symptoms typically appearing in individuals between the ages of 20 and 30 years. The condition is characterized by well-defined patches of depigmented skin, with the edges of the affected areas being the most prominent. Trauma to the skin may also trigger the development of new lesions, a phenomenon known as the Koebner phenomenon.
Vitiligo is often associated with other autoimmune disorders such as type 1 diabetes mellitus, Addison’s disease, autoimmune thyroid disorders, pernicious anemia, and alopecia areata. While there is no cure for vitiligo, there are several management options available. These include the use of sunblock to protect the affected areas of skin, camouflage make-up to conceal the depigmented patches, and topical corticosteroids to reverse the changes if applied early. Other treatment options may include topical tacrolimus and phototherapy, although caution is advised when using these treatments on patients with light skin. Overall, early diagnosis and management of vitiligo can help to improve the quality of life for affected individuals.
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This question is part of the following fields:
- Dermatology
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Question 2
Correct
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A 16-year-old patient presents with concerns about her acne treatment. She has been using a topical gel containing benzoyl peroxide and clindamycin for the past 3 months but has not seen significant improvement.
Upon examination, she has inflammatory papules and closed comedones on her forehead and chin, as well as some on her upper back. She is interested in a stronger medication and asks if she should continue using the gel alongside it.
What advice should you give regarding her current topical treatment?Your Answer: Change to topical benzoyl peroxide alone, or topical retinoid
Explanation:To effectively treat acne, it is not recommended to use both topical and oral antibiotics together. Instead, the patient should switch to using either topical benzoyl peroxide or a topical retinoid alone. Continuing to use the current combination gel or switching to topical clindamycin or topical lymecycline alone are not recommended as they involve the use of both topical and oral antibiotics, which can lead to antibiotic resistance. According to NICE guidelines, a combination of topical benzoyl peroxide or a topical retinoid with oral antibiotics is a more effective treatment option.
Acne vulgaris is a common skin condition that usually affects teenagers and is characterized by the obstruction of hair follicles with keratin plugs, resulting in comedones, inflammation, and pustules. The severity of acne can be classified as mild, moderate, or severe, depending on the number and type of lesions present. Treatment for acne typically involves a step-up approach, starting with single topical therapy and progressing to combination therapy or oral antibiotics if necessary. Tetracyclines are commonly used but should be avoided in certain populations, and a topical retinoid or benzoyl peroxide should always be co-prescribed to reduce the risk of antibiotic resistance. Combined oral contraceptives can also be used in women, and oral isotretinoin is reserved for severe cases under specialist supervision. Dietary modification has no role in the management of acne.
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This question is part of the following fields:
- Dermatology
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Question 3
Correct
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A 25 year old woman presents to you with worries about a lesion on the dorsal side of her left hand that has grown in size over the last six months. She reports that it disappeared during the summer but has now reappeared. The lesion is asymptomatic. On examination, you observe an annular plaque without any scaling. What is the most probable diagnosis?
Your Answer: Granuloma annulare
Explanation:A common presentation of granuloma annulare involves the development of circular lesions on the skin. In contrast, tinea often presents as a rash with scales.
Understanding Granuloma Annulare
Granuloma annulare is a skin condition characterized by papular lesions that are slightly hyperpigmented and depressed in the center. These lesions typically appear on the dorsal surfaces of the hands and feet, as well as on the extensor aspects of the arms and legs. While there have been associations proposed between granuloma annulare and conditions such as diabetes mellitus, the evidence for these links is weak.
Despite the lack of clear associations with other conditions, granuloma annulare can still be a frustrating and uncomfortable condition for those who experience it. The lesions can be unsightly and may cause itching or discomfort. Treatment options for granuloma annulare include topical or oral medications, as well as light therapy in some cases.
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This question is part of the following fields:
- Dermatology
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Question 4
Incorrect
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A 28 year-old woman comes to you with a recent skin lesion. She is in good health but is currently 16 weeks pregnant. She reports that the lesion appeared four weeks ago and has grown quickly. Upon examination, you observe a bright red, nodular lesion that is 14mm in diameter and shows signs of recent bleeding. What is the probable diagnosis?
Your Answer: Amelanotic melanoma
Correct Answer: Pyogenic granuloma
Explanation:Pyogenic Granuloma: A Common Benign Skin Lesion
Pyogenic granuloma is a benign skin lesion that is relatively common. Despite its name, it is not a true granuloma nor is it pyogenic in nature. It is also known as an eruptive haemangioma. The cause of pyogenic granuloma is unknown, but it is often linked to trauma and is more common in women and young adults. The most common sites for these lesions are the head/neck, upper trunk, and hands. Lesions in the oral mucosa are common during pregnancy.
Pyogenic granulomas initially appear as small red/brown spots that rapidly progress within days to weeks, forming raised, red/brown spherical lesions that may bleed profusely or ulcerate. Lesions associated with pregnancy often resolve spontaneously postpartum, while other lesions usually persist. Removal methods include curettage and cauterisation, cryotherapy, and excision.
In summary, pyogenic granuloma is a common benign skin lesion that can be caused by trauma and is more common in women and young adults. It appears as small red/brown spots that rapidly progress into raised, red/brown spherical lesions that may bleed or ulcerate. Lesions associated with pregnancy often resolve spontaneously, while other lesions usually persist and can be removed through various methods.
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This question is part of the following fields:
- Dermatology
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Question 5
Correct
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A young woman is referred acutely with a sudden onset of erythematous vesicular eruption affecting upper and lower limbs bilaterally also affecting trunk back and face. She had marked oral cavity ulceration, micturition was painful. She had recently been commenced on a new drug (Methotrexate) for rheumatoid arthritis. What is the likely diagnosis?
Your Answer: Stevens-Johnson syndrome
Explanation:Stevens-Johnson Syndrome: A Severe Drug Reaction
Stevens-Johnson syndrome (SJS), also known as erythema multiforme major, is a severe and extensive drug reaction that always involves mucous membranes. This condition is characterized by the presence of blisters that tend to become confluent and bullous. One of the diagnostic signs of SJS is Nikolsky’s sign, which is the extension of blisters with gentle sliding pressure.
In addition to skin lesions, patients with SJS may experience systemic symptoms such as fever, prostration, cheilitis, stomatitis, vulvovaginitis, and balanitis. These symptoms can lead to difficulties with micturition. Moreover, SJS can affect the eyes, causing conjunctivitis and keratitis, which carry a risk of scarring and permanent visual impairment.
If there are lesions in the pharynx and larynx, it is important to seek an ENT opinion. SJS is a serious condition that requires prompt medical attention.
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This question is part of the following fields:
- Dermatology
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Question 6
Incorrect
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An 80-year-old woman has been consulting with the practice nurse for a few weeks about a leg ulcer on her right leg that doesn't seem to be healing despite multiple rounds of antibiotics. You schedule some Doppler tests, which reveal an ankle: brachial pressure index (ABPI) of 0.4 in the affected leg and 0.8 in the other leg. A wound swab indicates the presence of coliforms. What is the most probable diagnosis from the options provided?
Your Answer: Underlying skin cancer
Correct Answer: Arterial insufficiency
Explanation:Understanding the Ankle-Brachial Pressure Index (ABPI) and its Role in Diagnosing Peripheral Arterial Disease
The ankle-brachial pressure index (ABPI) is a crucial diagnostic tool for identifying peripheral arterial disease. By comparing the systolic blood pressure at the ankle to the brachial artery pressure, doctors can determine if there is lower blood pressure in the leg, which is a sign of arterial disease. To measure the ABPI, a Doppler ultrasound blood flow detector and a sphygmomanometer are used to detect the artery pulse in the brachial and dorsalis pedis or posterior tibial arteries.
A normal ABPI falls between 0.9 and 1.2, while a value below 0.9 indicates arterial disease. An ABPI of 1.3 or greater is considered abnormal and suggests severe arterial disease. In cases where the ABPI is below 0.5, the disease is considered severe. It’s important to note that an ulcer with a normal ABPI is most likely a venous ulcer.
While coliforms are common commensals in leg ulcers and typically don’t require treatment, failure of any ulcer to heal should raise concerns about the possibility of a squamous cell carcinoma. Vasculitis typically doesn’t affect the ABPI unless it’s a large vessel vasculitis, such as polyarteritis nodosa, which would be apparent. Understanding the ABPI and its role in diagnosing peripheral arterial disease is crucial for effective treatment and management of this condition.
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This question is part of the following fields:
- Dermatology
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Question 7
Correct
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A 56-year-old man presents with a persistent cough. He reports no other health concerns and is not taking any regular medications. During the consultation, he requests a brief examination of his toenail, which has recently changed in appearance without any known cause. Specifically, the nail on his right big toe is thickened and yellowed at the outer edge. Although he experiences no discomfort or other symptoms, he is curious about the cause of this change.
What initial management approach would you recommend in this scenario?Your Answer: No treatment necessary if he is happy to leave it; give self-care advice
Explanation:If a patient has a fungal nail infection that is asymptomatic and doesn’t bother them in terms of appearance, treatment may not be necessary according to NICE CKS guidelines. However, if treatment is desired, topical antifungal treatment for 9-12 months may be appropriate for minor involvement of a single nail. Liver function tests should be checked before prescribing oral antifungal medication such as terbinafine. Self-care advice can be given to the patient, including keeping feet clean and dry, wearing breathable socks and footwear, and avoiding going barefoot in changing rooms. Referral to podiatry is not necessary unless the patient is unable to perform their own foot-care. Swabbing the skin for microscopy and culture may not be useful in cases where the skin is not involved.
Fungal Nail Infections: Causes, Symptoms, and Treatment
Fungal nail infections, also known as onychomycosis, can affect any part of the nail or the entire nail unit. However, toenails are more susceptible to infection than fingernails. The primary cause of fungal nail infections is dermatophytes, with Trichophyton rubrum being the most common. Yeasts, such as Candida, and non-dermatophyte molds can also cause fungal nail infections. Risk factors for developing a fungal nail infection include increasing age, diabetes mellitus, psoriasis, and repeated nail trauma.
The most common symptom of a fungal nail infection is thickened, rough, and opaque nails. Patients may present with unsightly nails, which can be a source of embarrassment. Differential diagnoses include psoriasis, repeated trauma, lichen planus, and yellow nail syndrome. To confirm a fungal nail infection, nail clippings or scrapings of the affected nail should be examined under a microscope and cultured. However, the false-negative rate for cultures is around 30%, so repeat samples may be necessary if clinical suspicion is high.
Asymptomatic fungal nail infections do not require treatment unless the patient is bothered by the appearance. Topical treatment with amorolfine 5% nail lacquer is recommended for limited involvement, while oral terbinafine is the first-line treatment for more extensive involvement due to a dermatophyte infection. Fingernail infections require 6 weeks to 3 months of therapy, while toenails should be treated for 3 to 6 months. Oral itraconazole is recommended for more extensive involvement due to a Candida infection, with pulsed weekly therapy being the preferred method.
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This question is part of the following fields:
- Dermatology
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Question 8
Correct
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A 48-year-old woman has a hard, smooth nodule on the right lower leg, measuring 0.5 cm in diameter. She first noticed it several months ago, and since then it has not changed. When the lesion is pinched between the fingers, it dimples inwards. The lesion is light brown, with regular pigmentation.
What is the most likely diagnosis?Your Answer: Dermatofibroma
Explanation:Distinguishing Different Skin Lesions: Dermatofibroma, Malignant Melanoma, Seborrhoeic Keratosis, Cutaneous Metastasis, and Actinic Keratosis
When it comes to skin lesions, it’s important to distinguish between different types to determine the appropriate treatment. One such lesion is a dermatofibroma, which is a benign growth that often appears on the limbs of women. A key feature of a dermatofibroma is the dimpling that occurs when the skin is pinched, due to the fibrous tissue underneath.
On the other hand, malignant melanoma is less likely to be the cause of a skin lesion if it has regular pigmentation, hasn’t changed in several months, and has dimpling – all features of a dermatofibroma. Seborrhoeic keratosis, another type of skin lesion, has a rough, stuck-on appearance that doesn’t match the description of a dermatofibroma.
A cutaneous metastasis, which is a skin lesion that results from cancer spreading from another part of the body, typically presents as a rapidly growing nodule. This is different from a dermatofibroma, which is relatively static. Similarly, an actinic keratosis, a flat lesion with a fine scale, is unlikely to be the diagnosis for a nodular lesion like a dermatofibroma.
In summary, understanding the characteristics of different skin lesions can help in accurately identifying and treating them.
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This question is part of the following fields:
- Dermatology
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Question 9
Incorrect
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A 21-year-old female patient comes to you with bilateral, symmetrical depigmented lesions on her upper limbs that have been getting larger since she first noticed them 3 weeks ago. You suspect vitiligo and want to start medication while she waits for her dermatology appointment. Which of the following medications should you consider?
Your Answer: Topical tacrolimus
Correct Answer: Potent topical corticosteroids
Explanation:In the early stages of vitiligo, the use of potent topical corticosteroids may be beneficial in reversing the changes. However, it is important to note that medications such as topical tacrolimus or oral steroids should only be prescribed by a dermatologist. Oral tacrolimus and topical miconazole are not effective in managing vitiligo, unless a fungal infection is suspected.
Understanding Vitiligo
Vitiligo is a medical condition that occurs when the immune system attacks and destroys melanocytes, leading to the loss of skin pigmentation. It is estimated to affect about 1% of the population, with symptoms typically appearing in individuals between the ages of 20 and 30 years. The condition is characterized by well-defined patches of depigmented skin, with the edges of the affected areas being the most prominent. Trauma to the skin may also trigger the development of new lesions, a phenomenon known as the Koebner phenomenon.
Vitiligo is often associated with other autoimmune disorders such as type 1 diabetes mellitus, Addison’s disease, autoimmune thyroid disorders, pernicious anemia, and alopecia areata. While there is no cure for vitiligo, there are several management options available. These include the use of sunblock to protect the affected areas of skin, camouflage make-up to conceal the depigmented patches, and topical corticosteroids to reverse the changes if applied early. Other treatment options may include topical tacrolimus and phototherapy, although caution is advised when using these treatments on patients with light skin. Overall, early diagnosis and management of vitiligo can help to improve the quality of life for affected individuals.
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This question is part of the following fields:
- Dermatology
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Question 10
Incorrect
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A 38-year-old man presents with peeling, dryness and mild itching of the palm of his right hand. On examination, there is hyperkeratosis of the palm with prominent white skin lines. The left hand appears normal.
What is the most appropriate investigation for this patient?Your Answer: Therapeutic trial of potent topical steroid
Correct Answer: Skin scraping for fungus
Explanation:Understanding Tinea Manuum: A Unilateral Scaly Rash
Tinea manuum is a type of fungal infection that affects the hands. It is characterized by a unilateral scaly rash that can also involve the back of the hand and nails. In some cases, both hands may be affected, but the involvement tends to be asymmetrical.
The most common cause of tinea manuum is an anthropophilic fungus such as Tricophyton rubrum, Tricophyton mentagrophytes, or Epidermophyton floccosum. These fungi are typically found on human skin and can be easily transmitted through direct contact.
In some cases, tinea manuum may present as a raised border with clearing in the middle, resembling a ringworm. This is more likely to occur when a zoophilic fungus is responsible, such as Trichophyton erinacei from a hedgehog or Microsporum canis from a cat or dog.
It is important to suspect dermatophyte fungus when a unilateral scaly rash is present on the hands. Treatment typically involves antifungal medication, and it is important to maintain good hand hygiene to prevent further spread of the infection.
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This question is part of the following fields:
- Dermatology
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Question 11
Incorrect
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A 67-year-old woman comes to see her GP with concerns about some small spots on her shoulder. She reports seeing small lesions with several tiny blood vessels emanating from the center. During the examination, you can press on them, causing them to turn white and then refill from the middle.
What is the condition associated with this type of lesion?Your Answer: Hereditary hemorrhagic telangiectasia
Correct Answer: Liver failure
Explanation:When differentiating between spider naevi and telangiectasia, it is important to note that spider naevi fill from the centre when pressed, while telangiectasia fill from the edge. A woman presenting with a small lesion surrounded by tiny blood vessels radiating from the middle that refills from the centre is likely to have a spider naevus. This condition is commonly associated with liver failure, making it the most likely diagnosis.
Understanding Spider Naevi
Spider naevi, also known as spider angiomas, are characterized by a central red papule surrounded by capillaries. These lesions can be found on the upper part of the body and blanch upon pressure. Spider naevi are more common in childhood, with around 10-15% of people having one or more of these lesions.
To differentiate spider naevi from telangiectasia, one can press on the lesion and observe how it fills. Spider naevi fill from the center, while telangiectasia fills from the edge.
Spider naevi can also be associated with liver disease, pregnancy, and the use of combined oral contraceptive pills. It is important to understand the characteristics and associations of spider naevi for proper diagnosis and treatment.
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This question is part of the following fields:
- Dermatology
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Question 12
Incorrect
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A 65-year-old female has been referred for management of a chronic ulcer above the left medial malleolus. The ankle-brachial pressure index readings are as follows:
Right 0.98
Left 0.98
The ulcer has been treated with standard dressings by the District Nurse. What is the most suitable approach to increase the chances of healing the ulcer?Your Answer: Hydrocolloid dressings
Correct Answer: Compression bandaging
Explanation:Compression bandaging is recommended for the management of venous ulceration, as the ankle-brachial pressure index readings suggest that the ulcers are caused by venous insufficiency rather than arterial issues.
Venous ulceration is a type of ulcer that is commonly found above the medial malleolus. To determine the cause of non-healing ulcers, it is important to conduct an ankle-brachial pressure index (ABPI) test. A normal ABPI value is between 0.9 to 1.2, while values below 0.9 indicate arterial disease. However, values above 1.3 may also indicate arterial disease due to arterial calcification, especially in diabetic patients.
The most effective treatment for venous ulceration is compression bandaging, specifically four-layer bandaging. Oral pentoxifylline, a peripheral vasodilator, can also improve the healing rate of venous ulcers. While there is some evidence supporting the use of flavonoids, there is little evidence to suggest the benefit of hydrocolloid dressings, topical growth factors, ultrasound therapy, and intermittent pneumatic compression.
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This question is part of the following fields:
- Dermatology
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Question 13
Correct
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A 55-year-old patient presents with abdominal symptoms and also requests that you examine a skin lesion on their shoulder. The patient reports having noticed the lesion for a few years and that it has slowly been increasing in size. They mention having worked as a builder and property developer, resulting in significant sun exposure. On examination, you note an irregular pale red patch on the right shoulder measuring 6x4mm. The lesion has a slightly raised 'rolled' pearly edge and a small eroded area in the center. There is no surrounding inflammation, and the lesion doesn't feel indurated.
What is your plan for managing this patient's skin lesion?Your Answer: Routine referral to dermatology
Explanation:When a superficial basal cell carcinoma (BCC) is suspected, it is recommended to make a standard referral. This presentation is typical of BCC, which usually grows slowly and hardly ever spreads to other parts of the body. Dermatology referral is necessary in such cases. While Efudix and cryotherapy may be used as substitutes for excision in treating superficial BCC, it is important to seek the guidance of a dermatologist.
Understanding Basal Cell Carcinoma
Basal cell carcinoma (BCC) is a type of skin cancer that is commonly found in the Western world. It is characterized by slow growth and local invasion, with metastases being extremely rare. Lesions are also known as rodent ulcers and are typically found on sun-exposed areas, particularly on the head and neck. The most common type of BCC is nodular BCC, which initially appears as a pearly, flesh-colored papule with telangiectasia. As it progresses, it may ulcerate, leaving a central crater.
If a BCC is suspected, a routine referral should be made. There are several management options available, including surgical removal, curettage, cryotherapy, topical cream such as imiquimod or fluorouracil, and radiotherapy.
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This question is part of the following fields:
- Dermatology
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Question 14
Correct
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A 60-year-old man presents with a painful rash consisting of erythematous, swollen plaques with clusters of small vesicles. These are present in a band on the left side of the body extending from the lower dorsal area of the back around the front of the abdomen but not crossing the midline. The rash has been present for 48 hours.
Which of the following is the most appropriate drug to prescribe for a patient presenting at this stage of the illness?
Your Answer: Aciclovir
Explanation:Treatment for Herpes Zoster (Shingles)
Herpes zoster, commonly known as shingles, is a viral infection that affects a specific dermatome. It is recommended to start antiviral treatment, such as aciclovir, within 72 hours of rash onset for individuals over 50 years old. Aciclovir has been shown to reduce the duration of symptoms and the risk of post-herpetic neuralgia. It is also indicated for those with ophthalmic herpes zoster, non-truncal rash, moderate to severe pain or rash, and immunocompromised individuals. Prednisolone may be added to aciclovir, but results are mixed. Pain relief can be achieved with co-codamol, but stronger medications may be necessary. Amitriptyline or gabapentin may be used for post-herpetic neuralgia. Antiviral treatment is not recommended for immunocompetent children with mild symptoms.
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This question is part of the following fields:
- Dermatology
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Question 15
Correct
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A 28-year-old woman presents with a severe flare-up of hand eczema. She has vesicular lesions on both hands, which are typical of bilateral pompholyx. The patient has been using Eumovate (clobetasone butyrate 0.05%) for a week, but her symptoms have not improved. You decide to prescribe Betnovate (betamethasone valerate 0.1%) for two weeks and then review her condition. According to the BNF guidelines, what is the appropriate amount of Betnovate to prescribe?
Your Answer: 30 g
Explanation:Topical Steroids for Eczema Treatment
Eczema is a common skin condition that causes red, itchy, and inflamed skin. Topical steroids are often used to treat eczema, but it is important to use the weakest steroid cream that effectively controls the patient’s symptoms. The potency of topical steroids varies, and the table below shows the different types of topical steroids by potency.
To determine the appropriate amount of topical steroid to use, the fingertip rule can be applied. One fingertip unit (FTU) is equivalent to 0.5 g and is sufficient to treat an area of skin about twice the size of an adult hand. The table also provides the recommended number of FTUs per dose for different areas of the body.
The British National Formulary (BNF) recommends specific quantities of topical steroids to be prescribed for a single daily application for two weeks. The recommended amounts vary depending on the area of the body being treated.
In summary, when using topical steroids for eczema treatment, it is important to use the weakest steroid cream that effectively controls symptoms and to follow the recommended amounts for each area of the body.
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This question is part of the following fields:
- Dermatology
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Question 16
Incorrect
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An 80-year-old man comes to you with concerns about several scaly patches on his scalp. He mentions that they are not causing him any discomfort. Upon examination, you observe numerous rough scaly lesions on his sun-damaged skin, accompanied by extensive erythema and telangiectasia.
What would be the most appropriate course of action for managing this condition?Your Answer: 1% hydrocortisone cream
Correct Answer: 5-fluorouracil cream
Explanation:Topical diclofenac can be utilized to treat mild actinic keratoses in this individual.
Actinic keratoses, also known as solar keratoses, are skin lesions that develop due to prolonged exposure to the sun. These lesions are typically small, crusty, and scaly, and can appear in various colors such as pink, red, brown, or the same color as the skin. They are commonly found on sun-exposed areas like the temples of the head, and multiple lesions may be present.
To manage actinic keratoses, prevention of further risk is crucial, such as avoiding sun exposure and using sun cream. Treatment options include a 2 to 3 week course of fluorouracil cream, which may cause redness and inflammation. Topical hydrocortisone may be given to help settle the inflammation. Topical diclofenac is another option for mild AKs, with moderate efficacy and fewer side-effects. Topical imiquimod has shown good efficacy in trials. Cryotherapy and curettage and cautery are also available as treatment options.
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This question is part of the following fields:
- Dermatology
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Question 17
Incorrect
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A 28-year-old woman presents with chronic dandruff that worsens during the winter months and has not responded to over-the-counter treatments. She reports a rash on her elbows and knees. On examination, she has silvery scale on her scalp, elbows, and knees that can be removed but causes pinpoint bleeding. The thickness of the scalp scale is not significant. What is the most suitable initial management option?
Your Answer: Coal tar-based shampoo
Correct Answer: Betamethasone lotion
Explanation:Treatment Options for Scalp Psoriasis: NICE Guidelines and Beyond
Scalp psoriasis is a common condition that can cause discomfort and embarrassment. One telltale sign is Auspitz’s sign, where pinpoint bleeding occurs when a scale is removed due to thinning of the epidermal layer overlying the dermal papillae. The National Institute for Health and Care Excellence (NICE) recommends using a potent corticosteroid as initial treatment for up to four weeks, followed by a different formulation or calcipotriol if necessary. Topical agents containing salicylic acid, emollients, or oils can also be used to remove scale before resuming corticosteroid treatment. However, tar-based shampoos are not recommended as a sole treatment option. A combined product containing calcipotriol and betamethasone dipropionate may be used as a first-line treatment, as it has been shown to be more effective than using the drugs separately. Overall, there are various treatment options available for scalp psoriasis, and it is important to consult with a healthcare professional to determine the best course of action.
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This question is part of the following fields:
- Dermatology
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Question 18
Correct
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A 16-year-old boy presents with acne affecting his face. On examination, there are multiple comedones on his face and a handful of papules and pustules. There are no nodules or scarring. The treating doctor decides to start him on topical benzoyl peroxide combined with an antibiotic.
Which of the following is the single most appropriate topical antibiotic to use?Your Answer: Clindamycin
Explanation:Treatment Options for Mild to Moderate Acne: Clindamycin, Lymecycline, Flucloxacillin, Minocycline, and Trimethoprim
Acne is classified as mild to moderate if there are less than 35 inflammatory lesions and less than 2 nodules. For this type of acne, topical clindamycin is recommended as a first-line treatment, which can be combined with benzoyl peroxide, adapalene, or tretinoin. On the other hand, oral lymecycline is not recommended for mild to moderate acne but is effective for moderate to severe acne. Flucloxacillin is not used in acne treatment, while minocycline is effective but can cause liver problems and a lupus-like syndrome. Lastly, trimethoprim is used for people with moderate to severe acne who cannot tolerate or have a contraindication to oral lymecycline or doxycycline. It is important to consult with a healthcare professional to determine the best treatment option for each individual case of acne.
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This question is part of the following fields:
- Dermatology
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Question 19
Correct
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An 80-year-old man comes to the clinic with painful swelling of his penis and a retracted foreskin. He has a long-term catheter in place. What is the most frequent cause of paraphimosis in a non-diabetic man of this age? Choose ONE answer.
Your Answer: Failure of a clinician to replace the foreskin after a procedure
Explanation:Causes of Paraphimosis: Understanding the Factors Involved
Paraphimosis is a medical condition where the foreskin becomes trapped behind the glans penis and cannot be reduced. While it can be a painful and distressing condition, it is important to understand the various factors that can contribute to its development.
One common cause of paraphimosis is the failure of a clinician to replace the foreskin after a procedure. This can occur during penile examination, cleaning, catheterisation, or cystoscopy. If the foreskin is left retracted for too long, it can become swollen and difficult to reduce.
Another potential cause is chronic balanoposthitis, which is a chronic inflammation of the glans and foreskin. While this is uncommon, it can lead to phimosis (inability to retract the foreskin) in men with diabetes.
Lichen sclerosus is another dermatological condition that can lead to phimosis. While it is uncommon, it is important to be aware of this potential cause.
Excessive sexual activity is not a common cause of paraphimosis and is not indicated by the history. However, it is important to practice safe and responsible sexual behavior to prevent any potential complications.
Finally, while sildenafil has been reported to cause priapism (a sustained painful penile erection), it is not a known cause of paraphimosis. By understanding the various factors involved in the development of paraphimosis, individuals can take steps to prevent this condition and seek appropriate medical care if necessary.
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This question is part of the following fields:
- Dermatology
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Question 20
Correct
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A 47-year-old patient complains of pruritic lesions on the soles of their feet that have persisted for the last two months. Upon examination, small blisters are observed, accompanied by dry and cracked skin in the surrounding area. What is the probable diagnosis?
Your Answer: Pompholyx
Explanation:Understanding Pompholyx Eczema
Pompholyx eczema, also known as dyshidrotic eczema, is a type of skin condition that affects both the hands and feet. It is often triggered by humidity and high temperatures, such as sweating. The main symptom of pompholyx eczema is the appearance of small blisters on the palms and soles, which can be intensely itchy and sometimes accompanied by a burning sensation. Once the blisters burst, the skin may become dry and crack.
To manage pompholyx eczema, cool compresses and emollients can be used to soothe the affected areas. Topical steroids may also be prescribed to reduce inflammation and itching. It is important to avoid further irritation of the skin by avoiding triggers such as excessive sweating and using gentle, fragrance-free products. With proper management, the symptoms of pompholyx eczema can be controlled and minimized.
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This question is part of the following fields:
- Dermatology
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Question 21
Incorrect
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A 29-year-old woman, Sarah, has been taking Microgynon-30 for 8 months as a form of birth control. She recently returned from a vacation in Thailand and has noticed the development of melasma on her face. Despite her busy work schedule, she has made time to visit her GP for advice on preventing further melasma after sun exposure. What recommendations should her GP provide to help Sarah?
Your Answer: Suggest she stops Microgynon and uses condoms
Correct Answer: Change Microgynon-30 to Cerazette (desogestrel)
Explanation:Switching from the combined contraceptive pill to a progesterone only pill can potentially decrease melasma, as it is believed that elevated levels of estrogen stimulate melanocytes. Given her irregular work schedule, Cerazette, which has a 12-hour usage window, may be a better option for her than norethisterone.
Understanding Melasma: A Common Skin Condition
Melasma is a skin condition that causes the development of dark patches or macules on sun-exposed areas, especially the face. It is more common in women and people with darker skin. The term chloasma is sometimes used to describe melasma during pregnancy. The condition is often associated with hormonal changes, such as those that occur during pregnancy or with the use of hormonal medications like the combined oral contraceptive pill or hormone replacement therapy.
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This question is part of the following fields:
- Dermatology
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Question 22
Incorrect
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A 14-year-old girl with eczema comes in with a bumpy, gooseflesh-like texture on her upper arms. She denies any itching or redness. What is the MOST SUITABLE course of action to take next?
Your Answer: Topical fusidic acid
Correct Answer: Routine bloods
Explanation:Understanding Keratosis Pilaris
Keratosis pilaris is a prevalent skin condition that is characterised by small bumps on the skin. These bumps are caused by the buildup of keratin in the hair follicles, resulting in a rough, bumpy texture. While the condition can resolve on its own over time, there is no specific treatment that has been proven to be effective.
It is important to note that referral, blood tests, and topical antibacterials are not recommended for the treatment of keratosis pilaris. Instead, individuals with this condition may benefit from taking tepid showers instead of hot baths. This can help to prevent further irritation of the skin. With proper care and attention, individuals with keratosis pilaris can manage their symptoms and enjoy healthy, smooth skin.
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This question is part of the following fields:
- Dermatology
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Question 23
Correct
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A 30-year-old woman has been experiencing an uncomfortable rash around her mouth for the past 2 months. She uses a skin-cleansing face wash daily and applies hydrocortisone 1% ointment twice a day. Additionally, she has sought advice from a pharmacist who recommended clotrimazole 2% cream and has started using an old tube of fusidic acid cream. She has also started taking iron supplements after reading online that her symptoms may be due to iron deficiency. Despite all these efforts, her rash is getting worse.
During examination, you observe clusters of papules with surrounding erythema around her mouth, with sparing of her lip margins. There are no comedones, cysts, or nodules.
What is the top priority treatment that should be discontinued?Your Answer: Hydrocortisone
Explanation:The patient’s perioral dermatitis is likely being exacerbated by her use of topical steroids, so the primary focus of treatment should be to avoid them. Topical erythromycin or clindamycin may be helpful for some patients, while more severe cases may require oral antibiotics like tetracycline or doxycycline. To be cautious, it is recommended that the patient stop using all topical creams and switch to a gentle non-soap-based cleanser for facial washing. It is important to note that oral iron is not a contributing factor to perioral dermatitis, and it is possible that the patient may have mistaken her symptoms for angular cheilitis, which is linked to iron deficiency.
Understanding Periorificial Dermatitis
Periorificial dermatitis is a skin condition that is commonly observed in women between the ages of 20 and 45 years old. The use of topical corticosteroids, and to a lesser extent, inhaled corticosteroids, is often linked to the development of this condition. The symptoms of periorificial dermatitis include the appearance of clustered erythematous papules, papulovesicles, and papulopustules, which are typically found in the perioral, perinasal, and periocular regions. However, the skin immediately adjacent to the vermilion border of the lip is usually spared.
When it comes to managing periorificial dermatitis, it is important to note that steroids may actually worsen the symptoms. Instead, the condition should be treated with either topical or oral antibiotics. By understanding the features and management of periorificial dermatitis, individuals can take the necessary steps to address this condition and improve their skin health.
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This question is part of the following fields:
- Dermatology
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Question 24
Incorrect
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Which of the following is the least probable cause of a bullous rash?
Your Answer: Furosemide
Correct Answer: Lichen planus
Explanation:The bullous form of lichen planus is an exceptionally uncommon occurrence.
Bullous Disorders: Causes and Types
Bullous disorders are characterized by the formation of fluid-filled blisters or bullae on the skin. These can be caused by a variety of factors, including congenital conditions like epidermolysis bullosa, autoimmune diseases like bullous pemphigoid and pemphigus, insect bites, trauma or friction, and certain medications such as barbiturates and furosemide.
Epidermolysis bullosa is a rare genetic disorder that affects the skin’s ability to adhere to the underlying tissue, leading to the formation of blisters and sores. Autoimmune bullous disorders occur when the immune system mistakenly attacks proteins in the skin, causing blistering and inflammation. Insect bites can also cause bullae to form, as can trauma or friction from activities like sports or manual labor.
Certain medications can also cause bullous disorders as a side effect. Barbiturates, for example, have been known to cause blistering and skin rashes in some people. Furosemide, a diuretic used to treat high blood pressure and edema, can also cause bullae to form in some cases.
Overall, bullous disorders can be caused by a variety of factors and can range from mild to severe. Treatment options depend on the underlying cause and may include medications, wound care, and lifestyle modifications.
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This question is part of the following fields:
- Dermatology
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Question 25
Incorrect
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A male patient of yours has just been diagnosed with malignant melanoma.
In what age group is the highest incidence rate per 100,000 population with this type of malignancy in the US?Your Answer: 25-49 years
Correct Answer: 60-69 years
Explanation:Melanoma Skin Cancer in the UK
According to Cancer Research UK, melanoma skin cancer is the 5th most common cancer in the UK, accounting for 4% of all new cancer cases. Every year, there are approximately 16,700 new cases of melanoma skin cancer in the UK, which equates to 46 new cases every day.
Melanoma skin cancer affects both males and females, with around 8,400 new cases reported in each gender annually. The incidence rates for melanoma skin cancer are highest in people aged 85 to 89.
It is important to be aware of the risks and symptoms of melanoma skin cancer, such as changes in the size, shape, or color of moles or other skin lesions. Early detection and treatment can greatly improve the chances of successful treatment and recovery.
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This question is part of the following fields:
- Dermatology
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Question 26
Correct
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You saw a 9-year-old girl accompanied by her dad at the GP surgery with a one-day history of itchy rash on her ears. She is normally healthy and doesn't take any regular medication. On examination, you notice small blisters on the outer rims of her ear which causes mild discomfort on palpation. The rest of the skin appears normal. What is the most suitable initial treatment for this condition?
Your Answer: Emollient
Explanation:Emollients, potent topical steroids, and avoiding strong direct sunlight are effective treatments for juvenile spring eruption. Antihistamines can also be used to alleviate itching. Infection is not a known factor in this condition, which is associated with UV light exposure. In more severe cases or when there is widespread polymorphic light eruption, oral steroids and phototherapy may be necessary.
Understanding Juvenile Spring Eruption
Juvenile spring eruption is a skin condition that occurs as a result of sun exposure. It is a type of polymorphic light eruption (PLE) that causes itchy red bumps on the light-exposed parts of the ears, which can turn into blisters and crusts. This condition is more common in boys aged between 5-14 years, and it is less common in females due to increased amounts of hair covering the ears.
The main cause of juvenile spring eruption is sun-induced allergy rash, which is more likely to occur in the springtime. Some patients may also have PLE elsewhere on the body, and there is an increased incidence in cold weather. The diagnosis of this condition is usually made based on clinical presentation, and no clinical tests are required in most cases. However, in aggressive cases, lupus should be ruled out by ANA and ENA blood tests.
The management of juvenile spring eruption involves providing patient education on sun exposure and the use of sunscreen and hats. Topical treatments such as emollients or calamine lotion can be used to provide relief, and antihistamines can help with itch relief at night-time. In more serious cases, oral steroids such as prednisolone can be used, as well as immune-system suppressants.
In conclusion, understanding juvenile spring eruption is important for proper diagnosis and management. By taking preventative measures and seeking appropriate treatment, patients can manage their symptoms and improve their quality of life.
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This question is part of the following fields:
- Dermatology
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Question 27
Correct
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A 32-year-old man with a history of atopic eczema and contact dermatitis experiences worsening of his dermatitis due to irritants at work. What is the most frequent irritant that leads to contact dermatitis?
Your Answer: Soap and cleaning agents
Explanation:Common Causes of Contact Dermatitis
Contact dermatitis is a skin condition that occurs when the skin comes into contact with an irritant or allergen. The most common causes of contact dermatitis include soap and cleaning agents, which can affect people in various fields, especially cleaners and healthcare workers. Wet work is also a significant cause of dermatitis. Latex, particularly in the form of latex-powdered gloves, used to be a common irritant, but the use of latex-free gloves has reduced its occurrence. Nickel found in jewelry can cause a localized reaction, but it is less common than dermatitis caused by soap and cleaning products. Acrylics can also cause contact dermatitis, but they are less common than other irritants. Natural fibers like cotton are less likely to cause a dermatitis reaction compared to synthetic fibers.
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This question is part of the following fields:
- Dermatology
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Question 28
Incorrect
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You are assessing a patient with chronic plaque psoriasis. Previously, a combination of beclomethasone and calcipotriol was attempted but proved ineffective. Subsequently, calcipotriol monotherapy was prescribed twice daily, but this also failed to alleviate symptoms. The patient, who is in his mid-thirties, presents with plaques measuring approximately 6-7 cm on his elbows and knees. According to NICE guidelines, what are the two most suitable options to discuss with him?
Your Answer: Tacrolimus OR a coal tar preparation
Correct Answer: Beclomethasone twice a day OR a coal tar preparation
Explanation:Psoriasis is a chronic skin condition that can also affect the joints. The National Institute for Health and Care Excellence (NICE) has released guidelines for managing psoriasis and psoriatic arthropathy. For chronic plaque psoriasis, NICE recommends a stepwise approach starting with regular use of emollients to reduce scale loss and itching. First-line treatment involves applying a potent corticosteroid and vitamin D analogue separately, once daily in the morning and evening, for up to 4 weeks. If there is no improvement after 8 weeks, a vitamin D analogue twice daily can be used as second-line treatment. Third-line options include a potent corticosteroid applied twice daily for up to 4 weeks or a coal tar preparation applied once or twice daily. Phototherapy and systemic therapy are also options for managing psoriasis.
For scalp psoriasis, NICE recommends using a potent topical corticosteroid once daily for 4 weeks. If there is no improvement, a different formulation of the corticosteroid or a topical agent to remove adherent scale can be used before applying the corticosteroid. For face, flexural, and genital psoriasis, a mild or moderate potency corticosteroid applied once or twice daily for a maximum of 2 weeks is recommended.
When using topical steroids, it is important to be aware of potential side effects such as skin atrophy, striae, and rebound symptoms. The scalp, face, and flexures are particularly prone to steroid atrophy, so topical steroids should not be used for more than 1-2 weeks per month. Systemic side effects may occur when potent corticosteroids are used on large areas of the body. NICE recommends a 4-week break before starting another course of topical corticosteroids and using potent corticosteroids for no longer than 8 weeks at a time and very potent corticosteroids for no longer than 4 weeks at a time. Vitamin D analogues, such as calcipotriol, can be used long-term and tend to reduce the scale and thickness of plaques but not the redness. Dithranol and coal tar are other treatment options with their own unique mechanisms of action and potential adverse effects.
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This question is part of the following fields:
- Dermatology
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Question 29
Correct
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Roughly what proportion of individuals with psoriasis experience a related arthropathy?
Your Answer: 10-20%
Explanation:Psoriatic arthropathy is a type of inflammatory arthritis that is associated with psoriasis. It is classified as one of the seronegative spondyloarthropathies and is characterized by joint inflammation that often precedes the development of skin lesions. While it affects both males and females equally, only 10-20% of patients with psoriasis develop this condition. The presentation of psoriatic arthropathy can vary, with the most common types being symmetric polyarthritis and asymmetrical oligoarthritis. Other signs include psoriatic skin lesions, periarticular disease, and nail changes. X-rays may show erosive changes and new bone formation, as well as a pencil-in-cup appearance. Treatment is similar to that of rheumatoid arthritis, but mild cases may only require NSAIDs and newer monoclonal antibodies may be used. Overall, psoriatic arthropathy has a better prognosis than RA.
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This question is part of the following fields:
- Dermatology
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Question 30
Incorrect
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A 54-year-old woman comes in with a chronic rash on her face that she tries to conceal with heavy make-up. She has a history of recurrent conjunctivitis and itchy eyes. Upon examination, there are papules and pustules on her nose and forehead, along with sebaceous hyperplasia on the tip of her nose.
What is the most probable diagnosis?Your Answer: Systemic lupus erythematosus
Correct Answer: Acne rosacea
Explanation:Differentiating Skin Conditions: Acne Rosacea, Cosmetic Allergy, Systemic Lupus, and Dermatitis Herpetiformis
Skin conditions can be difficult to differentiate, but understanding their unique characteristics can help with accurate diagnosis and treatment. Acne rosacea is a common inflammatory condition that presents with pustules and papules, facial flushing, and secondary eye involvement. Contact dermatitis, on the other hand, lacks pustules and papules and is often associated with a history of exposure to an irritant or allergen. Comedones are not typically present in acne rosacea, especially in older patients.
Cosmetic allergy is another condition that can present with red, itchy, and scaly skin, often with blisters. It is more common than people realize, affecting up to 10% of the population over a lifetime. Irritant reactions are more common than allergic reactions, but both can be triggered by exposure to certain ingredients in cosmetics.
Systemic lupus is a chronic autoimmune disease that can affect multiple organs, including the skin. A classic sign of lupus is a butterfly-shaped rash on the face, but other systemic features should also be present. The rash tends to come and go, lasting hours or days.
Dermatitis herpetiformis is a chronic skin condition characterized by itchy papules and vesicles that typically affect the scalp, shoulders, buttocks, elbows, and knees. It is associated with gluten sensitivity and can be diagnosed with a skin biopsy.
In summary, understanding the unique characteristics of different skin conditions can help with accurate diagnosis and treatment. If you are experiencing skin symptoms, it is important to seek medical advice from a healthcare professional.
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This question is part of the following fields:
- Dermatology
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