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| Section | Objectives |
|---|---|
| Physician Roles (CanMEDS Framework) | - Collaborator
|
MCCQEの実際の試験の品質を確保するために、多くの努力をしました。私たちの会社は何百人もの専門家を雇うことに多額のお金を費やし、彼らは作品を書くためにチームを作りました。これらの専門家の資格は非常に高いです。 MCCQE学習ガイドに関する豊富な知識と豊富な経験があります。これらの専門家は、MCCQEの学習資料が公式に全員と面談するまでに多くの時間を費やしました。そして、MCCQEの実際の試験の内容について科学的な取り決めを行いました。優れたMCCQE試験問題でMCCQE試験に合格できます。
質問 # 354
You are a physician working at a university campus health centre. Staff at the centre are thinking about initiating a campus-wide education campaign on stimulant medication use and misuse. From a physician's perspective, which one of the following is the key message to include in this campaign?
正解：B
解説：
The key public health message from a physician's perspective is the evidence-based health risks and adverse effects associated with nonprescribed stimulant use (e.g., insomnia, anxiety, cardiovascular events, and dependency). This is central to a harm-reduction approach.
Toronto Notes 2023 - Public Health & Psychiatry, Substance Use:
"Misuse of prescription stimulants is common among university students. Education campaigns should emphasize medical risks including cardiovascular complications, addiction potential, and psychiatric disturbances." MCCQE1 Objectives - Preventive Medicine > Health Promotion:
"Candidates should identify core messages in public education campaigns, prioritizing evidence-based risks and harm reduction." Legal and ethical issues (B, C) are important but secondary to the health implications. Prevalence data (D) informs the campaign design, but is not the message itself. Study habits (A) are relevant for academic counseling, not medical messaging.
質問 # 355
An 80-year-old woman presents to the Emergency Department with dizziness. She has a medical history of coronary artery disease. On examination, she is alert and oriented. Her vital signs are as follows:
Her electrocardiogram is shown in the image.
Which one of the following is the most likely diagnosis?
Blood pressure
80/60 mm Hg
Heart rate
40/min
Respiratory rate
12/min
Her electrocardiogram is shown in the attached image. Which one of the following is the most likely diagnosis?
正解：A
解説：
Comprehensive and Detailed Explanation:
The ECG reveals:
* Regular P waves that are not consistently followed by QRS complexes
* A dissociation between the atrial (P wave) and ventricular (QRS complex) activity
* A slow ventricular rate (~40 bpm) independent of atrial rate
These findings are characteristic of a third-degree (complete) atrioventricular (AV) block, where there is no conduction of atrial impulses to the ventricles. The atria and ventricles beatindependently, and the ventricular rate is maintained by an escape rhythm, often junctional or ventricular in origin.
This correlates with the patient's symptoms (dizziness, hypotension) and bradycardia, suggesting inadequate cardiac output due to AV dissociation.
Toronto Notes 2023 - Cardiology:
"Third-degree AV block shows complete AV dissociation with independent atrial and ventricular activity. It typically presents with bradycardia and hypotension. Urgent pacing may be required." MCCQE1 Objectives (Cardiology > 34-2: Bradyarrhythmias and Conduction Disorders):
"Candidates must identify complete heart block and recognize its clinical urgency." Ruling out other options:
* A. Sinus bradycardia would show regular P waves with 1:1 P-QRS conduction.
* B. First-degree AV block has prolonged PR intervals (>200 ms) but all P waves are conducted.
* D. Junctional escape rhythm may present with bradycardia, but P waves would be absent, inverted, or occur after QRS complexes.
* E. Mobitz type I (Wenckebach) has progressively lengthening PR intervals before a dropped QRS.
質問 # 356
A 46-year-old woman with a palpable breast lump underwent diagnostic mammography that revealed a suspicious mass in her right breast. The radiologist recommended a breast biopsy. The referring physician did not see the mammogram report or the recommendation for biopsy. One year later, invasive breast cancer is diagnosed in the patient. Which one of the following is most likely to prevent this issue from happening again?
正解：A
解説：
This case represents a failure of follow-up of a critical test result , a common systems error in ambulatory care. MCCQE ELOM objectives emphasize physician responsibility for ensuring that ordered investigations are reviewed, communicated, and acted upon appropriately. The most effective prevention strategy is implementing a system-level tracking process for all investigative reports, ensuring that results are received, reviewed, documented, and followed up-especially abnormal findings requiring urgent action.
Relying on ad hoc communication (e.g., radiologists phoning every result) is impractical and not sustainable.
Booking routine return appointments does not guarantee abnormal results are addressed in a timely manner.
Informing patients only if abnormal findings exist is insufficient, as missed reports may still go unnoticed.
Asking patients to retrieve their own results shifts professional responsibility inappropriately.
A structured tracking system (e.g., electronic alerts, mandatory acknowledgment of results, reconciliation logs) reduces missed diagnoses and enhances patient safety. This systems-based approach aligns with quality improvement principles and shared accountability in healthcare delivery.
質問 # 357
A 20-year-old woman from a remote northern community presents to the office with a 2-week history of malaise and a 2-day history of disabling pain in her left elbow. She had a sore throat 4 weeks ago. She also notes that she has had 2 weeks of pain and swelling in her right knee, followed by pain and swelling in her left elbow. On examination, you note 0.5-cm to 1-cm nodules just above both her elbows. You find no active joint swelling. An electrocardiogram shows a prolonged PR interval. Which one of the following is the most appropriate investigation?
正解：B
解説：
This presentation is most consistent with acute rheumatic fever (ARF): a history of pharyngitis 4 weeks earlier, migratory large-joint pain/swelling (knee then elbow), subcutaneous nodules over extensor surfaces, and prolonged PR interval (a Jones minor criterion indicating cardiac involvement). MCCQE objectives emphasize that diagnosing ARF requires meeting Jones criteria plus evidence of preceding group A streptococcal (GAS) infection. Because the sore throat occurred weeks ago, a pharyngeal culture is often negative and is less useful for establishing prior GAS infection. The most appropriate test is therefore an antistreptolysin O (ASO) titre (or other streptococcal serology such as anti-DNase B), which documents a recent streptococcal immune response and supports the diagnosis. Echocardiography can assess severity of carditis/valvular disease, but it does not provide the required evidence of preceding GAS infection.
Rheumatoid factor and biopsy of nodules do not address the likely ARF diagnosis.
質問 # 358
A 42-year-old woman presents with a 2-day history of a low-grade fever and a painful left breast mass. On examination, there is a fluctuant erythematous tender mass with surrounding induration in the left breast and enlarged lymph nodes in the left axilla. An ultrasound shows a loculated cystic mass. Which one of the following is the most likely diagnosis?
正解：C
解説：
Comprehensive and Detailed Explanation:
A fluctuant, erythematous, tender breast mass with systemic signs (fever, lymphadenopathy) and ultrasound showing a cystic lesion is diagnostic for a breast abscess. It commonly arises from untreated mastitis.
Toronto Notes 2023 - Surgery, "Breast Disease":
"Abscess presents as a fluctuant, erythematous mass. Ultrasound confirms loculated fluid. Treatment includes drainage and antibiotics." MCCQE1 Objectives (Surgery > 50-1: Breast Conditions):
"Candidates must identify signs of infection and abscess and differentiate from malignancy or benign lesions." Fibroadenoma (C) is non-tender, mobile, and firm. Ductal ectasia (B) causes nipple discharge. Fibrocystic changes (D) are bilateral and cyclic. Inflammatory breast cancer (E) is rapidly progressive but lacks fluctuation and cystic features.
質問 # 359
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