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Question 1
Incorrect
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A 56-year-old woman visits her GP complaining of an increase in the frequency of her migraine attacks. She experiences episodes every 3 weeks, lasting approximately 24 hours, and finds that zolmitriptan only partially relieves her symptoms. As a result, she is taking time off from her job as a teacher and is worried about losing her employment. Her medical history includes asthma, and she is currently taking zolmitriptan and salbutamol. Additionally, she takes evening primrose oil over-the-counter to alleviate her menopause symptoms, which began 16 months ago. What medication would be the most appropriate for the GP to prescribe to decrease the frequency of her migraine attacks?
Your Answer: Propranolol
Correct Answer: Topiramate
Explanation:For the prophylactic management of migraines in a patient with a history of asthma, the recommended medication is topiramate. Propranolol is an alternative first-line option, but should be avoided in patients with asthma. Amitriptyline is a second-line drug for those who are not responsive to initial prophylactic treatment. Diclofenac is an NSAID used for acute management of migraines, while triptans like sumatriptan are used for acute treatment but not prophylaxis. It should be noted that topiramate is teratogenic and should be avoided in women of childbearing age.
Managing Migraines: Guidelines and Treatment Options
Migraines can be debilitating and affect a significant portion of the population. To manage migraines, it is important to understand the different treatment options available. According to the National Institute for Health and Care Excellence (NICE) guidelines, acute treatment for migraines involves a combination of an oral triptan and an NSAID or paracetamol. For young people aged 12-17 years, a nasal triptan may be preferred. If these measures are not effective, non-oral preparations of metoclopramide or prochlorperazine may be considered, along with a non-oral NSAID or triptan.
Prophylaxis should be given if patients are experiencing two or more attacks per month. NICE recommends topiramate or propranolol, depending on the patient’s preference, comorbidities, and risk of adverse events. Propranolol is preferred in women of childbearing age as topiramate may be teratogenic and reduce the effectiveness of hormonal contraceptives. Acupuncture and riboflavin may also be effective in reducing migraine frequency and intensity for some people. For women with predictable menstrual migraines, frovatriptan or zolmitriptan may be recommended as a type of mini-prophylaxis.
Specialists may consider other treatment options, such as candesartan or monoclonal antibodies directed against the calcitonin gene-related peptide (CGRP) receptor, like erenumab. However, pizotifen is no longer recommended due to common adverse effects like weight gain and drowsiness. It is important to exercise caution with young patients as acute dystonic reactions may develop. By following these guidelines and considering various treatment options, migraines can be effectively managed.
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This question is part of the following fields:
- Neurology
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Question 2
Incorrect
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A 78-year-old man presents to the emergency department with sudden onset of left-sided weakness, facial droop, and dysphasia that started 3 hours ago. He has a medical history of hypertension, hypercholesterolemia, diabetes mellitus, and asthma.
Upon examination, his pulse is regular at 88 beats per minute, respiratory rate is 15 breaths per minute, and oxygen saturation is 97% on room air. His temperature is 37.4ºC, blood pressure is 215/120 mmHg, and blood sugar is 6.8mmol/L. Heart sounds are normal, lungs are clear, and abdomen is soft and nontender. Neurological examination reveals left hemianopia and 0/5 power in the left upper and lower limbs.
Before considering thrombolysis, what additional steps should be taken based on the patient's examination findings?Your Answer: Prescribe simvastatin
Correct Answer: Prescribe labetalol
Explanation:Before considering thrombolysis for a patient, it is crucial to ensure that their blood pressure is well-controlled. If the patient’s blood pressure is above 200/120mmHg, thrombolysis cannot be performed. In such cases, medications like Labetalol are administered to rapidly lower the blood pressure. The other options mentioned are not suitable as the patient’s chest and BM examinations were normal. Additionally, statins do not play a role in the acute management of stroke.
The Royal College of Physicians (RCP) and NICE have published guidelines on the diagnosis and management of patients following a stroke. The management of acute stroke includes maintaining normal levels of blood glucose, hydration, oxygen saturation, and temperature. Blood pressure should not be lowered in the acute phase unless there are complications. Aspirin should be given as soon as possible if a haemorrhagic stroke has been excluded. Anticoagulants should not be started until brain imaging has excluded haemorrhage. Thrombolysis with alteplase should only be given if administered within 4.5 hours of onset of stroke symptoms and haemorrhage has been definitively excluded. Mechanical thrombectomy is a new treatment option for patients with an acute ischaemic stroke. NICE recommends thrombectomy for people who have acute ischaemic stroke and confirmed occlusion of the proximal anterior circulation demonstrated by computed tomographic angiography or magnetic resonance angiography. Secondary prevention includes the use of clopidogrel and dipyridamole. Carotid artery endarterectomy should only be considered if carotid stenosis is greater than 70% according to ECST criteria or greater than 50% according to NASCET criteria.
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This question is part of the following fields:
- Neurology
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Question 3
Incorrect
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A 58-year-old woman visits her GP urgently, reporting a 10-minute episode where she experienced vision loss in her right eye. The GP suspects a transient ischaemic attack (TIA) and prescribes 300mg aspirin while referring her to the TIA clinic. The diagnosis is amaurosis fugax. Which area of the brain anatomy is impacted by this type of stroke?
Your Answer: Posterior cerebral artery
Correct Answer: Retinal/ophthalmic artery
Explanation:It is unlikely that the patient experienced a stroke as her symptoms resolved completely after 10 minutes and there were no ongoing symptoms. Different types of strokes affect different arteries in the brain. For example, a lesion in the anterior cerebral artery would result in contralateral hemiparesis and sensory loss, with the lower extremities being more affected than the upper. On the other hand, a lesion in the posterior cerebral artery would cause contralateral homonymous hemianopia with macular sparing. If the posterior inferior cerebellar artery is affected, the patient may experience ipsilateral facial pain and temperature loss, as well as contralateral limb and torso pain and temperature loss, along with ataxia and nystagmus. A middle cerebral artery stroke would cause contralateral hemiparesis and sensory loss, with the upper extremity being more affected than the lower, as well as contralateral homonymous hemianopia and aphasia.
When a stroke occurs, the location of the lesion in the brain can determine the specific effects on the body. Depending on which artery is affected, different symptoms may arise. For example, a stroke in the anterior cerebral artery can lead to contralateral hemiparesis and sensory loss, with the lower extremity being more affected than the upper. On the other hand, a stroke in the middle cerebral artery can cause contralateral hemiparesis and sensory loss, with the upper extremity being more affected than the lower, as well as contralateral homonymous hemianopia and aphasia.
If the stroke occurs in the posterior cerebral artery, the individual may experience contralateral homonymous hemianopia with macular sparing and visual agnosia. In the case of Weber’s syndrome, which involves branches of the posterior cerebral artery that supply the midbrain, the person may have an ipsilateral CN III palsy and contralateral weakness of the upper and lower extremities.
Other types of strokes include those affecting the posterior inferior cerebellar artery, which can lead to ipsilateral facial pain and temperature loss and contralateral limb/torso pain and temperature loss, as well as ataxia and nystagmus. A stroke in the anterior inferior cerebellar artery can cause similar symptoms to Wallenberg’s syndrome, but with the addition of ipsilateral facial paralysis and deafness.
Finally, lacunar strokes are small, localized strokes that often occur in individuals with hypertension. They typically present with isolated hemiparesis, hemisensory loss, or hemiparesis with limb ataxia, and commonly affect the basal ganglia, thalamus, and internal capsule.
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This question is part of the following fields:
- Neurology
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Question 4
Incorrect
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A 60-year-old woman comes to the clinic complaining of a gradual loss of hearing and ringing in her right ear for the past 4 weeks. Upon examination, her ear canal and tympanic membrane appear normal. Rinne's test shows air conduction is better than bone conduction on both sides, but Weber's test reveals that the sound is heard best in her left ear. What is the probable diagnosis?
Your Answer: Presbyacusis
Correct Answer: Acoustic neuroma
Explanation:Understanding Vestibular Schwannoma (Acoustic Neuroma)
Vestibular schwannoma, also known as acoustic neuroma, is a type of brain tumor that accounts for 5% of intracranial tumors and 90% of cerebellopontine angle tumors. The condition is characterized by a combination of symptoms such as vertigo, hearing loss, tinnitus, and an absent corneal reflex. The affected cranial nerves can predict the features of the condition. For instance, cranial nerve VIII can cause vertigo, unilateral sensorineural hearing loss, and unilateral tinnitus. On the other hand, cranial nerve V can lead to an absent corneal reflex, while cranial nerve VII can cause facial palsy.
Bilateral vestibular schwannomas are often seen in neurofibromatosis type 2. The diagnosis of vestibular schwannoma is made through an MRI of the cerebellopontine angle, and audiometry is also important since only 5% of patients have a normal audiogram.
The management of vestibular schwannoma involves surgery, radiotherapy, or observation. The choice of treatment depends on the size and location of the tumor, the patient’s age and overall health, and the severity of symptoms. In conclusion, understanding vestibular schwannoma is crucial in managing the condition effectively.
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This question is part of the following fields:
- Neurology
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Question 5
Correct
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A mother brings her 8-year-old son into surgery. He has been experiencing recurrent headaches. What is the most common feature of migraine in children?
Your Answer: Gastrointestinal disturbance
Explanation:Children with migraine often experience nausea, vomiting, and abdominal pain.
Diagnostic Criteria for Migraine
Migraine is a neurological disorder that affects millions of people worldwide. The International Headache Society has established diagnostic criteria for migraine without aura, which includes at least five attacks lasting between 4-72 hours and having at least two of the following characteristics: unilateral location, pulsating quality, moderate or severe pain intensity, and aggravation by routine physical activity. During the headache, there must be at least one of the following: nausea and/or vomiting, photophobia, and phonophobia. The headache cannot be attributed to another disorder.
Migraine with aura, which is seen in around 25% of migraine patients, tends to be easier to diagnose with a typical aura being progressive in nature and may occur hours prior to the headache. Typical aura include a transient hemianopic disturbance or a spreading scintillating scotoma (‘jagged crescent’). Sensory symptoms may also occur. NICE criteria suggest that migraines may be unilateral or bilateral and give more detail about typical auras, which may occur with or without headache and are fully reversible, develop over at least 5 minutes, and last 5-60 minutes. Atypical aura symptoms such as motor weakness, double vision, visual symptoms affecting only one eye, poor balance, and decreased level of consciousness may prompt further investigation or referral.
In summary, the diagnostic criteria for migraine without aura include specific characteristics of the headache and associated symptoms, while migraine with aura is characterized by typical aura symptoms that may occur prior to the headache. It is important to accurately diagnose migraine to provide appropriate treatment and management for those who suffer from this debilitating condition.
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This question is part of the following fields:
- Neurology
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Question 6
Correct
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A 67-year-old woman presents to the Memory Clinic with a 9-month history of cognitive decline. Her daughter mentions that she has difficulty remembering basic tasks and is becoming more confused and forgetful than usual. Her daughter noticed a change in her personality and has caught her leaving the stove on and wandering outside alone on multiple occasions.
Given the likely diagnosis, which of the following is the most appropriate initial step in this patient’s management?
Select the SINGLE most appropriate management from the list below.
Your Answer: Stop drugs that may be exacerbating memory problems or confusion (anticholinergics, central nervous system drugs)
Explanation:Managing Frontotemporal Dementia: Treatment Options and Referrals
Frontotemporal dementia (FTD) is a progressive neurodegenerative disorder that affects behavior, language, and executive function. While there is no cure for FTD, management strategies can help alleviate symptoms and provide support for patients and their families.
One important step in managing FTD is to stop any drugs that may be exacerbating memory problems or confusion, such as anticholinergics or central nervous system drugs. Multidisciplinary health and social care is also crucial, involving referrals to geriatric medicine, psychiatry, psychology, social work, occupational therapy, speech and language therapy, physiotherapy, and community nursing.
However, certain treatment options should be avoided or used with caution in FTD patients. Benzodiazepines, for example, are associated with cognitive worsening and fall-related injuries. Anticholinesterase inhibitors, typically used in mild to moderate Alzheimer’s disease, have shown disappointing results in FTD patients who do not have cholinergic loss. Memantine, used in moderate to severe Alzheimer’s disease, has not been shown to be effective in FTD and may even have a detrimental effect on cognition in some individuals.
Antipsychotics should only be used cautiously and when other options have failed, as FTD patients are at higher risk of extrapyramidal side effects. Overall, a personalized and coordinated approach to FTD management is essential for optimizing patient outcomes.
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This question is part of the following fields:
- Neurology
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Question 7
Correct
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A 50-year-old female patient arrives at the emergency department via ambulance after experiencing a sudden onset of facial droop and speech impairment. Upon examination, she is conscious but displays both expressive and receptive aphasia. The patient's GP summary record indicates that she is only taking tamoxifen. Based on this information, what is the most probable medical condition in her past medical history?
Your Answer: Oestrogen receptor-positive breast cancer
Explanation:Pre-menopausal women with oestrogen receptor-positive breast cancer are managed using Tamoxifen.
Tamoxifen is ineffective in treating oestrogen receptor-negative breast cancer or ovarian cancer.
However, Tamoxifen may increase the risk of endometrial cancer.
Colorectal cancer is not treated with Tamoxifen.Anti-oestrogen drugs are used in the management of oestrogen receptor-positive breast cancer. Selective oEstrogen Receptor Modulators (SERM) such as Tamoxifen act as an oestrogen receptor antagonist and partial agonist. However, Tamoxifen can cause adverse effects such as menstrual disturbance, hot flushes, venous thromboembolism, and endometrial cancer. On the other hand, aromatase inhibitors like Anastrozole and Letrozole reduce peripheral oestrogen synthesis, which is important in postmenopausal women. Anastrozole is used for ER +ve breast cancer in this group. However, aromatase inhibitors can cause adverse effects such as osteoporosis, hot flushes, arthralgia, myalgia, and insomnia. NICE recommends a DEXA scan when initiating a patient on aromatase inhibitors for breast cancer.
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This question is part of the following fields:
- Neurology
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Question 8
Correct
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A 47-year-old woman presents to the Stroke Clinic for review after experiencing a transient ischaemic attack (TIA). It is suspected that the patient’s TIA was caused by an issue with her carotid arteries.
A magnetic resonance angiogram (MRA) is requested followed by catheter angiography. The MRA shows a right internal carotid with narrowed eccentric lumen, surrounded by a crescent-shaped mural thrombus and thin annular enhancement. The catheter angiogram shows a ‘string sign’ in the right internal carotid.
What internal carotid abnormality is most likely the cause of this patient’s TIA?
Your Answer: Carotid-artery dissection
Explanation:Cervico-cerebral arterial dissections (CADs) are a common cause of strokes in younger patients, accounting for almost 20% of strokes in those under 45 years old. The majority of cases involve the extracranial internal carotid artery, while extracranial vertebral dissections make up about 15% of cases. A high level of suspicion is necessary to diagnose CAD, and confirmation can be obtained through various imaging techniques such as Doppler ultrasonography, magnetic resonance imaging/magnetic resonance angiography (MRA), computed tomography angiography (CTA), or catheter angiography. CTA can reveal several characteristic features of CAD, including an abnormal vessel contour, enlargement of the dissected artery, an intimal flap, and a dissecting aneurysm. The traditional method of diagnosing arterial dissections is catheter angiography, which typically shows a long segment of narrowed lumen known as the string sign. Other conditions such as carotid-artery pseudoaneurysm, carotid-artery aneurysm, carotid-artery occlusion, and carotid-artery stenosis can also be identified through imaging techniques, but they are not evident in this particular angiogram.
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This question is part of the following fields:
- Neurology
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Question 9
Correct
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A 35-year-old woman visits her GP complaining of a headache that she describes as worsening over the past three weeks. She reports that the headache wakes her during the night, and is worse when she coughs.
Which of the following is the most likely diagnosis?
Your Answer: Brain tumour
Explanation:The patient’s symptoms suggest a headache caused by increased pressure within the skull, which is often associated with a space-occupying lesion such as a brain tumor. This type of headache is typically worse in the morning and aggravated by bending forward, coughing, or sneezing. As the tumor grows, other symptoms such as vomiting, seizures, and neurological deficits may develop. Brain tumors can be primary or metastatic, with the most common types being astrocytoma, glioblastoma, oligodendroglioma, ependymoma, meningioma, and primary CNS lymphoma.
The patient’s history does not support a diagnosis of giant cell arteritis, which typically affects individuals over 50 years old and presents with an abrupt-onset headache, scalp tenderness, jaw pain, visual disturbances, and constitutional symptoms such as fever and weight loss. The diagnosis of GCA requires specific criteria, including age at onset, new headache, temporal artery abnormality, elevated erythrocyte sedimentation rate, and abnormal artery biopsy.
The patient’s symptoms are also not consistent with cluster headaches, which typically affect younger males and present with severe, unilateral pain around the eye, accompanied by lacrimation and nasal congestion. Cluster headaches have a circadian pattern and occur in episodes, followed by symptom-free periods.
Migraine is another type of headache that is not likely in this case, as the patient’s symptoms do not fit the typical pattern of unilateral, pulsating pain lasting 4-72 hours, accompanied by nausea/vomiting and photophobia.
Finally, subarachnoid hemorrhage is a medical emergency that presents with a sudden, severe headache, often described as the worst headache of one’s life, along with other symptoms such as vomiting, loss of consciousness, seizures, and neurological deficits. However, the patient’s headache has been progressing over weeks, which is not consistent with SAH.
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This question is part of the following fields:
- Neurology
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Question 10
Correct
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A 65-year-old woman is referred to the general medical clinic with a history of about 10 attacks of pins and needles in her right arm and leg over a period of 4 weeks. Her GP is concerned that this patient will soon have a completed stroke despite already being on aspirin. Typical attacks lasted for about 5 min and there were no additional symptoms. On closer enquiry she said that the sensation started in her right foot and then, over a period of about 1 min, spread ‘like water running up my leg’ to involve her whole leg and arm. Each attack was identical. Her past medical history includes hypertension and diabetes, for which she already takes aspirin. There are no abnormalities on neurological examination, but her blood pressure is 180/100 mmHg.
Which of the following is the most likely diagnosis?
Your Answer: Partial epileptic seizure affecting the right hemisphere
Explanation:Differential Diagnosis for Recurrent Neurological Symptoms
Recurrent neurological symptoms can be caused by a variety of conditions, and a thorough differential diagnosis is necessary to determine the underlying cause. In the case of a patient experiencing march-like progression of symptoms affecting the left side of the body, several possibilities must be considered.
A partial epileptic seizure affecting the right hemisphere is a likely cause, as the positive sensory symptoms and stereotyped nature of the episodes are typical of epilepsy. The rapid progression of symptoms over seconds to a minute is also characteristic of seizure activity.
Transient ischaemic attacks (TIAs) affecting the right hemisphere are less likely, as the march-like progression of symptoms and positive sensory symptoms are not typical of a vascular cause. TIAs are more likely to present with loss of sensation rather than abnormal sensations.
Recurrent, deep, white-matter microhaemorrhages are a possibility due to the patient’s risk factors, but the stereotyped nature of the attacks and positive sensory symptoms make this diagnosis less likely. Microhaemorrhages would typically present with numbness affecting the entire left side at onset.
Migraine equivalent is a rare possibility, but the rapid progression of symptoms and frequency of episodes make this diagnosis unlikely. Migraine aura without headache typically spreads over 20-30 minutes and is more common in patients with a history of previous migraine.
Cerebral venous thrombosis is also unlikely, as the absence of headache makes this diagnosis less probable. CVT typically presents with headache and other neurological symptoms.
In conclusion, the positive sensory features, stereotyped nature, and march of symptoms suggest epilepsy as the most likely cause of the patient’s recurrent neurological symptoms.
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This question is part of the following fields:
- Neurology
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