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Question 1
Correct
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Which of the following would be the most appropriate treatment (leaving out the current NICE guidelines) for a 29 year old man with erythrodermic psoriasis and arthritis mutilans involving several digits of both hands?
Your Answer: Etanercept
Explanation:TNF-alpha inhibitors are known to ameliorate the symptoms and disease activity of Arthritis mutilans (a rare and severe form of psoriatic arthritis), by disabling the cytokines that are involved in inflammation and joint destruction. From the mentioned choices, this would be the most effective option. Methotrexate is the most commonly used DMARD, followed by sulfasalazine used in mild to moderate forms of psoriatic arthritis but has not shown much efficacy in arthritis mutilans. Phototherapy, narrowband UVB light therapy can be very effective in clearing skin lesions.
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This question is part of the following fields:
- Rheumatology
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Question 2
Incorrect
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A 50-year-old man had a fasting blood glucose test as part of a work-up for hypertension. It comes back as 6.5 mmol/l. The test is repeated and reported as 6.7 mmol/l. He says he feels constantly tired but denies any polyuria or polydipsia. How should these results be interpreted?
Your Answer:
Correct Answer: Impaired fasting glycaemia
Explanation:A fasting blood glucose level from 110 to 126 mg/dL (5.5 to 6.9 mmol/L) is considered prediabetes. This result is sometimes called impaired fasting glucose.
Diabetes mellitus (type 2): diagnosisThe diagnosis of type 2 diabetes mellitus can be made by plasma glucose. If the patient is symptomatic:
fasting glucose greater than or equal to 7.0 mmol/l
random glucose greater than or equal to 11.1 mmol/l (or after 75g oral glucose tolerance test)
If the patient is asymptomatic the above criteria apply but must be demonstrated on two separate occasions. -
This question is part of the following fields:
- Endocrinology
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Question 3
Incorrect
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An 18-year-old woman has been diagnosed with human papillomavirus infection. What is the most significant long-term risk following this infection?
Your Answer:
Correct Answer: Cervical cancer
Explanation:Human-papilloma virus (HPV) can lead to cervical cancer. There are many different types, but the types associated with cervical cancer most commonly are 16, 18, 31, 33, and 35. The vaccination against HPV protects against the most common types of HPV that are seen in cervical cancer and is recommended for children/young teens. Cervical cancer has a clear association with HPV, making this the best answer over all of the other answer choices.
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This question is part of the following fields:
- Infectious Diseases
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Question 4
Incorrect
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Which of the following is not a risk factor for primary open-angle glaucoma?
Your Answer:
Correct Answer: Hypermetropia
Explanation:Acute angle closure glaucoma is associated with hypermetropia, whereas primary open-angle glaucoma is associated with myopia. Glaucoma is a group of eye disorders characterised by optic neuropathy due, in the majority of patients, to raised intraocular pressure (IOP). It is now recognised that a minority of patients with raised IOP do not have glaucoma and vice versa.
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This question is part of the following fields:
- Ophthalmology
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Question 5
Incorrect
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A 62-year-old lady is referred with painless jaundice and weight loss. Bilirubin is 214 mmol/L, alanine transaminase (ALT) 62 U/L, alkaline phosphatase (ALP) 605 U/L, albumin 34 g/L and prothrombin time 17 seconds. Ultrasound of the abdomen shows a grossly dilated biliary tree and a dilated pancreatic duct, but no mass is seen.
What is the next most appropriate step in her management?Your Answer:
Correct Answer: Abdominal CT scan
Explanation:This scenario is suggestive of a pancreatic head mass with obstructive jaundice and US showing a ‘double duct’ sign. A CT Scan would be recommended to evaluate for a pancreatic head mass. If a mass was found, the next step would then be to do an ERCP with EUS to obtain a biopsy of the mass for tissue diagnosis. Laparoscopy would not be recommended. CA19-9 would not be diagnostic.
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This question is part of the following fields:
- Gastroenterology
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Question 6
Incorrect
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A number of tests have been ordered for a 49 year old male who has systemic lupus erythematosus (SLE). He was referred to the clinic because he has increased shortness of breath. One test in particular is transfer factor of the lung for carbon monoxide (TLCO), which is elevated. Which respiratory complication of SLE is associated with this finding?
Your Answer:
Correct Answer: Alveolar haemorrhage
Explanation:Alveolar haemorrhage (AH) is a rare, but serious manifestation of SLE. It may occur early or late in disease evolution. Extrapulmonary disease may be minimal and may be masked in patients who are already receiving immunosuppressants for other symptoms of SLE.
DLCO or TLCO (diffusing capacity or transfer factor of the lung for carbon monoxide (CO)) is the extent to which oxygen passes from the air sacs of the lungs into the blood.
Factors that can increase the DLCO include polycythaemia, asthma (can also have normal DLCO) and increased pulmonary blood volume as occurs in exercise. Other factors are left to right intracardiac shunting, mild left heart failure (increased blood volume) and alveolar haemorrhage (increased blood available for which CO does not have to cross a barrier to enter). -
This question is part of the following fields:
- Respiratory
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Question 7
Incorrect
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Organophosphates, such as Sarin, have been used as chemical-warfare agents by terrorists.
Which of the following statements is true concerning organophosphate poisoning?Your Answer:
Correct Answer: Atropine is useful in the management of organophosphate poisoning
Explanation:The principal action of organophosphates is the inhibition of acetylcholinesterase’s, therefore leading to the accumulation of acetylcholine at muscarinic receptors (miosis, hypersalivation, sweating, diarrhoea, excessive bronchial secretions), nicotinic receptors (muscle fasciculations and tremor) and in the central nervous system (anxiety, loss of memory, headache, coma).
Removal from the source of the organophosphate, adequate decontamination, supplemental oxygen and atropine are the initial treatment measures. Pralidoxime, an activator of cholinesterase, should be given to all symptomatic patients.
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This question is part of the following fields:
- Pharmacology
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Question 8
Incorrect
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A 55 yr. old female with a history of hypertension presented with severe central chest pain for the past one hour, associated with sweating and vomiting. Her ECG showed ST elevation myocardial infarction, evident in leads V2-V4. Which of the following is an absolute contraindication for thrombolysis?
Your Answer:
Correct Answer: Intracranial neoplasm
Explanation:Absolute contraindications for fibrinolytic use in STEMI
Prior intracranial haemorrhage (ICH)
Known structural cerebral vascular lesion
Known malignant intracranial neoplasm
Ischemic stroke within 3 months
Suspected aortic dissection
Active bleeding or bleeding diathesis (excluding menses)
Significant closed head trauma or facial trauma within 3 months
Intracranial or intraspinal surgery within 2 months
Severe uncontrolled hypertension (unresponsive to emergency therapy)
For streptokinase, prior treatment within the previous 6 months -
This question is part of the following fields:
- Cardiology
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Question 9
Incorrect
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A 41-year-old yoga instructor presents with a 2-month history of left-hand weakness. She has no significant past medical history. On examination, there is mild weakness of the left upper and lower limbs with a right sided facial weakness, which spares the forehead. Which of the following is the most likely location of the lesion?
Your Answer:
Correct Answer: Right pons
Explanation:The pons is above the level of decussation of the corticospinal tracts so a pontine lesion would cause a contralateral limb weakness.
The facial motor nucleus is located in the pons and supplies the ipsilateral facial muscles.
A right cerebral lesion would give left upper and lower limb weakness. It would also cause a left sided facial weakness.
A left cerebral lesion would give right upper and lower limb weakness with right facial weakness.
Finally, a cervical spinal cord lesion would not cause a facial weakness. -
This question is part of the following fields:
- Neurology
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Question 10
Incorrect
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A 50-year-old female patient is started on cyclophosphamide for vasculitis associated with Wegener's granulomatosis. Which of the following adverse effects is most characteristically associated with cyclophosphamide use?
Your Answer:
Correct Answer: Haemorrhagic cystitis
Explanation:Cyclophosphamide is a cytotoxic alkylating agent that acts by causing cross-linking of DNA strands. Its major adverse effects include haemorrhagic cystitis, myelosuppression, and transitional cell carcinoma.
Cardiomyopathy is caused by doxorubicin and ototoxicity is caused by cisplatin. Alopecia and weight gain are associated with a variety of chemotherapeutic agents especially those that treat breast cancers (e.g. paclitaxel).
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This question is part of the following fields:
- Haematology & Oncology
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Question 11
Incorrect
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A 30 yr. old male with Down's Syndrome was found to have a systolic murmur during routine clinical examination. Which of the following is the most common cardiac defect associated with Down's Syndrome which will explain this finding?
Your Answer:
Correct Answer: Endocardial cushion defect
Explanation:Atrioventricular septal defect (AVSD) also known as endocardial cushion defect is the most common cardiac abnormality in Down’s Syndrome.
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This question is part of the following fields:
- Cardiology
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Question 12
Incorrect
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A 60-year old female suddenly started seeing a curtain-like shadow in her field of vision with flashes of lights and subsequent loss of vision, which prompted her to visit her ophthalmologist. What do you think is the most appropriate treatment in this case?
Your Answer:
Correct Answer:
Explanation:Flashes of light, presence of floaters and loss of vision (often described as a black curtain closing in on the visual field) are symptoms that strongly indicate retinal detachment. The fundoscopy findings of retinal tears support this diagnosis. Therefore, surgery of retina must be done to treat this patient.
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This question is part of the following fields:
- Ophthalmology
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Question 13
Incorrect
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A 33-year-old woman has missed her last two periods and has been lactating. Upon anamnesis, she claims she's lost weight and she's been suffering from vaginal dryness. The endocrinologist suggests that she checks her prolactin levels. Which of the following inhibits prolactin release from the hypophysis?
Your Answer:
Correct Answer: Dopamine
Explanation:Dopamine (DA) holds a predominant role in the regulation of prolactin (PRL) secretion. Through a direct effect on anterior pituitary lactotrophs, DA inhibits the basally high-secretory tone of the cell. It accomplishes this by binding to D2 receptors expressed on the cell membrane of the lactotroph, activation of which results in a reduction of PRL exocytosis and gene expression by a variety of intracellular signalling mechanisms.
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This question is part of the following fields:
- Clinical Sciences
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Question 14
Incorrect
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A 66-year-old man with newly-diagnosed small cell carcinoma discusses his further treatment options with the team of doctors.
Which statement is incorrect about small cell carcinoma?Your Answer:
Correct Answer: Patients with small cell lung cancer always benefit from surgery
Explanation:Small cell lung cancer (SCLC) is characterized by rapid growth and early dissemination. Prompt initiation of treatment is important.
Patients with clinical stage Ia (T1N0) after standard staging evaluation may be considered for surgical resection, but combined treatment with chemotherapy and radiation therapy is the standard of care. Radiation therapy is often added at the second cycle of chemotherapy.
Historically, patients undergoing surgery for small cell lung cancer (SCLC) had a dismal prognosis. However, more recent data suggest that patients with true stage I SCLC may benefit from surgical resection.
Common sites of hematogenous metastases include the brain, bones, liver, adrenal glands, and bone marrow. The symptoms depend upon the site of spread.
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This question is part of the following fields:
- Respiratory
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Question 15
Incorrect
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A 15-year-old girl presents with vomiting and her investigations show:
Sodium 115 mmol/L (137-144),
Potassium 3.0 mmol/L (3.5-4.9),
Urea 2.1 mmol/L (2.5-7.5),
Urine sodium 2 mmol/L,
Urine osmolality 750 mosmol/kg (350-1000).
What is the most likely diagnosis?Your Answer:
Correct Answer: Bulimia nervosa
Explanation:The patient is most likely to have Bulimia nervosa. A young girl with a low body mass contributes to the low urea. Hypokalaemia and hyponatraemia are due to vomiting. Her urine sodium is also low.
– In Addison’s diseases, there are low levels of sodium and high levels of potassium in the blood. In acute adrenal crisis: The most consistent finding is elevated blood urea nitrogen (BUN) and creatinine. Urinary and sweat sodium also may be elevated.
– In Syndrome of Inappropriate Antidiuretic Hormone Secretion (SIADH) there is hyponatremia with corresponding hypo-osmolality, continued renal excretion of sodium, urine less than maximally dilute and absence of clinical evidence of volume depletion. -
This question is part of the following fields:
- Endocrinology
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Question 16
Incorrect
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A 50-year-old gentleman with renal cell carcinoma has a haemoglobin of 19 g/dl. Which investigation will conclusively prove that this patient has secondary polycythaemia?
Your Answer:
Correct Answer: Erythropoietin level
Explanation:Erythropoietin (EPO) is used to distinguish between primary and secondary polycythaemia. Secondary polycythaemia can be caused by tumours in the kidney that may secrete EPO or EPO-like proteins.
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This question is part of the following fields:
- Nephrology
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Question 17
Incorrect
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A 25-year-old female presents to the acute medical unit with several lumps in her neck and under her arms, weight loss, vomiting, and low mood. She is investigated and is found to have several areas of suspicious lymphadenopathy including in the neck, both axillae, and mediastinum. She also has multiple lesions in her liver which are confirmed to be the manifestations of Hodgkin lymphoma after biopsy.
Which stage of the disease is the patient currently at?Your Answer:
Correct Answer: IV
Explanation:The patient is on stage IV according to the Ann Arbor staging system for Hodgkin lymphoma (HL). The disease has spread beyond the lymph nodes into the liver (involvement of extra lymphatic organ).
HL is a malignant proliferation of lymphocytes characterised by the presence of distinctive giant cells known as Reed-Sternberg cells. It has a bimodal age distribution being most common in the third and seventh decades of life.
Staging of HL is done according to the Ann Arbor staging system:
Stage
I: Single lymph node region (I) or one extra lymphatic site (IE)II: Two or more lymph node regions on same side of the diaphragm (II) or local extra lymphatic extension plus one or more lymph node regions on same side of the diaphragm (IIE)
III: Lymph node regions on both sides of the diaphragm (III) which may be accompanied by local extra lymphatic extension (IIIE)
IV: Diffuse involvement of one or more extra lymphatic organs or sites
Suffix
A: No B symptomsB: Presence of at least one of the following: unexplained weight loss >10% baseline during 6 months before staging; recurrent unexplained fever >38°C; recurrent night sweats
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This question is part of the following fields:
- Haematology & Oncology
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Question 18
Incorrect
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A 42-year-old man with alcoholic liver disease is admitted with pyrexia. He has been unwell for the past three days and has multiple previous admissions before with variceal bleeding. Examination shows multiple stigmata of chronic liver disease, ascites and jaundice.
Paracentesis is performed with the following results: Neutrophils 487 cells/ul.
What is the most appropriate treatment?Your Answer:
Correct Answer: Intravenous cefotaxime
Explanation:This describes a clinical scenario of spontaneous bacterial peritonitis. The diagnosis is made when fluid removed (ascites) is found to have > 250/mm cubed of PMNs (polymorphonuclear leukocytes). Cefotaxime or another third generation cephalosporin is the treatment of choice.
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This question is part of the following fields:
- Gastroenterology
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Question 19
Incorrect
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A husband visits the clinic with his wife because he wants to be screened for cystic fibrosis. His brother and wife had a child with cystic fibrosis so he is concerned. His wife is currently 10 weeks pregnant. When screened, he was found to be a carrier of the DF508 mutation for cystic fibrosis but despite this result, the wife declines testing. What are the chances that she will have a child with cystic fibrosis, given that the gene frequency for this mutation in the general population is 1/20?
Your Answer:
Correct Answer:
Explanation:The chance of two carriers of a recessive gene having a child that is homozygous for that disease (that is both genes are transmitted to the child) is 25%. Therefore, the chances of this couple having a child with CF are 25%(1/4) x 1/20 = 1/80.
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This question is part of the following fields:
- Respiratory
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Question 20
Incorrect
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A 55 year old female presents with progressive dyspnoea, dry cough and fever. She started methotrexate therapy six weeks ago. The current regimen includes methotrexate 15 mg/ week, folic acid 5 mg/day and aspirin 75 mg/day. There is no history of any other chronic illness. Vitals are as follows: Temp: 37.8C, pulse: 100 beats/min, BP: 110/80mmHg and SaO2: 90% on air. Examination reveals synovitis in both wrists, and metacarpophalangeal joints. On auscultation, there are scattered crepitations. Blood test reports are given below:
Haemoglobin: 13.1g/dl (13.0 – 18.0 g/dL),
WBC: 8.2 x109/l (4 – 11 x 109/l),
Neutrophils: 5.1×109/l (1.5 – 7 x 109/l),
Platelets: 280 x109/l (150 – 400 x 109/L),
ESR: 48 mm/hr (0 – 30 mm/1st hr),
Urea, electrolytes and creatinine: normal.
CXR: patchy airspace shadows bilaterally
What is the most likely diagnosis?Your Answer:
Correct Answer: Methotrexate pneumonitis
Explanation:Pneumonitis is a serious and unpredictable side-effect of treatment with methotrexate (MTX) that may become life-threatening. The typical clinical symptoms include progressive shortness of breath and cough, often associated with fever. Hypoxaemia and tachypnoea are always present and crackles are frequently audible. Chest radiography reveals a diffuse interstitial or mixed interstitial and alveolar infiltrate, with a predilection for the lower lung fields. Pulmonary function tests show a restrictive pattern with diminished diffusion capacity. Lung biopsy reveals cellular interstitial infiltrates, granulomas or a diffuse alveolar damage pattern accompanied by perivascular inflammation. Most patients present in the first few months of starting methotrexate. It is important that all patients receiving methotrexate be educated concerning this potential adverse reaction and instructed to contact their physicians should significant new pulmonary symptoms develop while undergoing therapy. If methotrexate pneumonitis is suspected, methotrexate should be discontinued, supportive measures instituted and careful examination for different causes of respiratory distress conducted. This may be treated with corticosteroids once underlying infection has been excluded.
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This question is part of the following fields:
- Rheumatology
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Question 21
Incorrect
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Choose the part of the antibody to which immune cells bind:
Your Answer:
Correct Answer: Fc region
Explanation:Fc Receptors include the IgG receptors (FcγR), high-affinity IgE receptor (FcεRI), IgA and IgA/IgM receptors, and neonatal Fc receptor for IgG (FcRn). In particular, the FcγRs have been well known to play an important role in many biologic processes including those associated with the response to infection and cancer as well as in the pathogenesis of immune-mediated diseases. Fc receptors, the receptors for the Fc region of immunoglobulins, play an essential role in antibody-dependent immune responses. Fc receptors are detected on many types of hematopoietic cells including macrophages, neutrophils, dendritic cells, eosinophils, basophils, mast cells, and NK cells. Plasma cells produce five classes of antibodies, IgA, IgD, IgE, IgG and IgM. Fc receptors with an Ig superfamily related structure exist that correspond to each of these classes of immunoglobulins.
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This question is part of the following fields:
- Clinical Sciences
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Question 22
Incorrect
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A study is carried out to assess the efficacy of a rapid urine screening test developed to detect Chlamydia. The total number of people involved in the study were 200. The study compared the new test to the already existing NAAT techniques. The new test was positive in 20 patients that were Chlamydia positive and in 3 patients that were Chlamydia negative. For 5 patients that were Chlamydia positive and 172 patients that were Chlamydia negative the test turned out to be negative. Choose the correct value regarding the negative predictive value of the new test:
Your Answer:
Correct Answer: 172/177
Explanation:The definition of negative predictive value is the probability that the individuals with truly negative screening test don’t have Chlamydia. The equation is the following: Negative predictive value = Truly negative/(truly negative + false negative) = 172 / (172 + 5) = 172 / 177
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This question is part of the following fields:
- Clinical Sciences
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Question 23
Incorrect
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A homeless woman presented with a cough and fever for the last 3 months. She also complained of night sweats and weight loss. Her CXR showed lung opacities. What is the next appropriate step for this patient?
Your Answer:
Correct Answer: Acid fast bacilli
Explanation:History and CXR are suggestive of tuberculosis. Acid fast bacilli should be seen on microscopy to confirm the diagnosis.
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This question is part of the following fields:
- Infectious Diseases
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Question 24
Incorrect
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Which is the best source of vitamin D per average serving for a woman with suspected Osteomalacia?
Your Answer:
Correct Answer: Cod liver oil
Explanation:Serum vitamin D levels are influenced by sun exposure and diet. Cod liver oil is an important dietary vitamin D source in high-latitude countries like Norway where there is no sun-induced vitamin D production during the winter. 14 Norwegian Health Authorities have recommended 5 ml of cod liver oil daily (400 IU of vitamin D) for more than 60 years to prevent diseases like rickets, formerly more prevalent in areas with little access to vitamin D-rich fatty fish.
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This question is part of the following fields:
- Clinical Sciences
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Question 25
Incorrect
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A 38-year-old chef is brought into the emergency department by her husband. He reports that she has been confused for the last 3 days. She has a long-standing history of severe psoriasis but no other past medical history.
Basic observations are all within normal range and a CT head is unremarkable. A fundoscopy exam reveals bilateral papilledema.
Which of the following is the most likely cause?Your Answer:
Correct Answer: Vitamin A toxicity
Explanation:Vitamin A toxicity is a rare cause of papilledema. In this case, the patient is likely to have been taking retinoids for psoriasis.
Encephalitis does not usually present with papilledema. Brain abscess, brain tumour and hydrocephalus are all less likely with a normal CT head.
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This question is part of the following fields:
- Ophthalmology
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Question 26
Incorrect
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Which one of the following statements regarding hepatocellular carcinoma is correct?
Your Answer:
Correct Answer: Diabetes mellitus is a risk factor
Explanation:Diabetes is a risk factor for hepatocellular carcinoma. Screening has been shown to be effective. Bevacizumab is not used for advanced cases. The incidence is higher in men. Alcohol is not the most common underlying cause worldwide; this is from cirrhosis from diseases like hepatitis B and C.
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This question is part of the following fields:
- Gastroenterology
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Question 27
Incorrect
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A 35-year-old gentleman is investigated for recurrent renal stones. He has been hospitalised on multiple occasions and has required lithotripsy three times. Investigations show the following:
Calcium 2.08 mmol/L,
Phosphate 0.85 mmol/L,
Parathyroid hormone 4.1 pmol/L (normal range = 0.8 - 8.5)
24 hour urinary calcium 521 mg/24 hours (normal range < 300)
Which one of the following treatments will most likely reduce the incidence of renal stones?Your Answer:
Correct Answer: Indapamide
Explanation:Indapamide is a mild thiazide-like diuretic with hypotensive effect, and compared to other thiazides, it is reported to also have less metabolic derangements. However, it may have beneficial hypo-calciuric effects that are often associated with thiazides, thus, in this case, we would recommend prescribing this to the patient.
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This question is part of the following fields:
- Nephrology
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Question 28
Incorrect
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A 50 year old woman with a 30 pack year history of smoking presents with a persistent cough and occasional haemoptysis. A chest x-ray which is done shows no abnormality. What percentage of recent chest x-rays were reported as normal in patients who are subsequently diagnosed with lung cancer?
Your Answer:
Correct Answer: 10%
Explanation:A retrospective cohort study of the primary care records of 247 lung cancer patients diagnosed between 1998–2002 showed that 10% of the X-rays were reported as normal.
Other tests may include:
– Imaging tests: A CT scan can reveal small lesions in your lungs that might not be detected on an X-ray.
– Sputum cytology: sputum may reveal the presence of lung cancer cells.
– Tissue sample (biopsy): A sample of abnormal cells may be removed for histological analysis. A biopsy may be performed in a number of ways, including bronchoscopy, mediastinoscopy and needle biopsy. A biopsy sample may also be taken from adjacent lymph nodes. -
This question is part of the following fields:
- Respiratory
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Question 29
Incorrect
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A 60-year-old librarian presents for review. She has recently been diagnosed with dry age-related macular degeneration.
Which of the following is the strongest risk factor for developing this condition?Your Answer:
Correct Answer: Smoking
Explanation:Age-related macular degeneration is the most common cause of blindness in the UK. Degeneration of the central retina (macula) is the key feature with changes usually bilateral. Smoking and genetic factors are risk factors for macular degeneration. The severity is divided into early, intermediate, and late types. The late type is additionally divided into dry and wet forms with the dry form making up 90% of cases.
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This question is part of the following fields:
- Ophthalmology
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Question 30
Incorrect
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Which of the following statements regarding psoriasis is incorrect?
Your Answer:
Correct Answer: Mediated by type 2 helper T cells
Explanation:Psoriasis is a long-lasting autoimmune disease which is characterized by patches of abnormal skin. These skin patches are typically red, itchy, and scaly commonly on the extensor surfaces. Psoriasis is associated with an increased risk of psoriatic arthritis, lymphomas, cardiovascular disease, Crohn’s disease, and depression. Psoriatic arthritis affects up to 30% of individuals with psoriasis. Psoriasis is mediated by type 1 helper T cells which are involved in the cell mediated response, rather than type 2 helper T cells
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This question is part of the following fields:
- Dermatology
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