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| Section | Objectives |
|---|---|
| Topic 1: Physician Roles (CanMEDS Framework) | - Medical Expert
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>> Valid MCCQE Test Materials <<
TestSimulate offers a complete MCCQE Part 1 Exam (MCCQE) practice questions in PDF format. This Medical Council of Canada MCCQE test questions pdf file format is simple to use and can be accessed from any device, including a desktop, tablet, laptop, Mac, or smartphone. No matter where you are, you can learn on the go. The PDF version of the MCCQE Part 1 Exam (MCCQE) exam questions is also readily printable, allowing you to keep tangible copies of the MCCQE Part 1 Exam (MCCQE) questions with you at all times.
NEW QUESTION # 312
A 72-year-old man has had 4 episodes of weakness in her right arm and leg lasting 10 to 15 minutes each.
During 1 episode, she had difficulty speaking and had blurring of the vision in the left eye. Which one of the following is the most likely diagnosis?
Answer: B
Explanation:
These are recurrent, brief (10-15 minute), fully resolving focal neurologic deficits, which fits transient ischemic attacks (TIAs) rather than completed stroke. The combination of right-sided arm and leg weakness and difficulty speaking localizes to the left cerebral hemisphere (dominant hemisphere for language in most patients). The additional symptom of transient blurring of vision in the left eye is characteristic of amaurosis fugax, caused by retinal ischemia from emboli or hypoperfusion in the ipsilateral internal carotid circulation.
Together, this pattern strongly suggests left internal carotid artery occlusive disease (e.g., high-grade stenosis with artery-to-artery embolization).
Left MCA thrombosis would typically produce persistent deficits rather than multiple short, self-resolving episodes. Intracerebral hemorrhage usually presents with sudden severe symptoms that do not resolve quickly and often includes headache or reduced consciousness. Epilepsy would more likely cause positive symptoms (jerking, automatisms) and postictal confusion. Vertebrobasilar disease causes posterior circulation symptoms (vertigo, diplopia, ataxia), not unilateral monocular vision loss plus contralateral weakness.
NEW QUESTION # 313
A previously healthy 7-year-old boy presents to the Emergency Department with a generalized tonic-clonic seizure, which subsided spontaneously after 10 minutes. There is no history of trauma. Physical examination reveals normal vital signs and a normal neurologic examination. Which one of the following diagnostic studies is urgently indicated?
Answer: B
Explanation:
This child experienced a first unprovoked generalized tonic-clonic seizure that resolved spontaneously and now has a normal neurologic examination and stable vital signs. MCCQE objectives emphasize that the immediate priority after a first seizure is to identify reversible metabolic causes , particularly hypoglycemia and electrolyte abnormalities (e.g., hyponatremia, hypocalcemia). Therefore, urgent serum electrolytes (and glucose) are indicated.
Neuroimaging (CT or MRI) is not urgently required in a neurologically normal child without focal deficits, trauma, persistent altered consciousness, or signs of increased intracranial pressure. MRI may be arranged later for further evaluation if clinically indicated. Electroencephalography is useful in outpatient follow-up to assess seizure type and recurrence risk but is not an emergency test. Lumbar puncture is reserved for suspected central nervous system infection (e.g., fever, meningeal signs, altered mental status), which are absent here.
Thus, immediate laboratory evaluation for metabolic derangements is the appropriate urgent investigation.
NEW QUESTION # 314
A 54-year-old woman presents to your office to discuss breast cancer screening. She is asymptomatic with no history of breast cancer. She had a fibroadenoma removed when she was 24 years old. The patient is not on any medications. Her family history is significant for a great-aunt with breast cancer. The patient has not had genetic testing but had normal breast screening 2 years ago. Which one of the following is the best next step?
Answer: C
Explanation:
According to Canadian guidelines, women aged 50 to 74 at average risk for breast cancer should undergo routine screening mammography every 2 to 3 years. A great-aunt with breast cancerdoes not raise this patient's risk to high. Mammography is appropriate as she is now due for the next screen.
Toronto Notes 2023 - Population Health, "Screening Guidelines" Section:
"Routine mammography is recommended every 2 years for average-risk women aged 50 to 74. Family history in second-degree or more distant relatives (e.g., great-aunt) does not qualify for high-risk screening or MRI." MCCQE1 Objectives (Population Health > 97-5: Screening and Prevention):
"Candidates should apply Canadian screening recommendations including mammography for average-risk women #50 years old." Self-breast exams (C) are not recommended for screening. PET scan (D) and MRI (E) are reserved for high- risk populations or diagnostic clarification.
NEW QUESTION # 315
The developers of a urinary protein dipstick test have indicated that they have reduced the problem of false positive results by changing the test so that it becomes positive at a higher concentration of protein. Which one of the following statements best describes how this screening test will be affected?
Answer: E
Explanation:
By increasing the threshold required for a positive test result, the developers have made the test more stringent. This reduces false positives, thereby increasing specificity. However, increasing the cutoff also means that some individuals with lower (but still clinically significant) levels of proteinuria will now test negative. As a result, the number of false negatives increases and sensitivity decreases. This reflects the fundamental trade-off between sensitivity and specificity when adjusting a diagnostic threshold. Screening tests typically favor high sensitivity to minimize missed cases, particularly for serious but treatable conditions.
Raising the threshold shifts the balance toward higher specificity at the expense of sensitivity. Positive predictive value (PPV) would likely increase because fewer false positives occur, but PPV also depends on disease prevalence. According to MCCQE objectives, candidates must understand how changes in diagnostic thresholds affect test characteristics, including sensitivity, specificity, predictive values, and false positive
/false negative rates, and apply these principles appropriately in screening and clinical decision-making.
NEW QUESTION # 316
A 45-year-old man is brought to the Emergency Department with chest pain. He has no significant medical history. He is anxious and agitated, and he reports severe central chest pain that began about 90 minutes ago.
His vital signs are as follows: blood pressure 200/110 mm Hg, heart rate 140/min, respiratory rate 30/min, oxygen saturation 98% on supplemental oxygen. Physical examination reveals a restless and slightly tremulous man. Pupils are 7 mm reactive. There are no focal neurologic signs. Cardiopulmonary examination is normal. The 12-lead electrocardiogram reveals sinus tachycardia; findings are otherwise normal. Which one of the following is the most likely cause of this clinical presentation?
Answer: E
Explanation:
This presentation most strongly suggests cocaine intoxication . MCCQE objectives emphasize recognizing toxidromes and life-threatening causes of chest pain. Cocaine is a potent sympathomimetic that increases catecholamines and causes marked hypertension, tachycardia, agitation/anxiety, tremor, tachypnea, and mydriasis , and it can precipitate severe chest pain via coronary vasospasm, increased myocardial oxygen demand, platelet activation, and potential aortic dissection. An ECG may show only sinus tachycardia early despite significant ischemic risk. In contrast, opioids (heroin, oxycodone) typically cause CNS depression, miosis , and respiratory depression. Alcohol intoxication does not usually cause extreme hypertension, mydriasis, and severe sympathomimetic agitation. Cannabis may cause anxiety and tachycardia but is less likely to produce this degree of hypertension and classic stimulant features. Therefore, cocaine best explains the combination of acute severe chest pain with a prominent sympathetic toxidrome. Immediate priorities include cardiac evaluation and treating stimulant toxicity (e.g., benzodiazepines and blood pressure control while avoiding isolated beta-blockade).
NEW QUESTION # 317
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