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| Section | Weight | Objectives |
|---|---|---|
| Dimensions of Care | 50% | - Chronic Care - Assessment and Diagnosis - Health Promotion and Illness Prevention - Acute Care |
| Physician Activities | 50% | - Communication - Professional Behaviours - Management - Psychosocial Aspects |
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NEW QUESTION # 342
In a research study, it is found that people who smoke tobacco cigarettes drink more coffee and have higher rates of lung cancer than people who do not smoke. However, the consumption of coffee alone is not associated with lung cancer. Which one of the following best describes the contribution of drinking coffee in the study?
Answer: A
Explanation:
A confounder is a variable associated with both the exposure and the outcome but not in the causal pathway.
In this study, coffee drinking is associated with smoking (the actual risk factor for lung cancer), but not independently associated with lung cancer.
Toronto Notes 2023 - Epidemiology Chapter:
"A confounder is a third variable that distorts the observed association between an exposure and an outcome.
It must be associated with both the exposure and the outcome, but not a result of the exposure." MCCQE1 Objectives (Population Health > 97-3: Study Design and Bias):
"Recognize and control for confounding in the interpretation of observational study data." Coffee is not a risk factor (B) since it's not independently associated with lung cancer, and it's not selection bias (C), which involves how participants are enrolled in a study.
NEW QUESTION # 343
You are evaluating a 75-year-old man with recently diagnosed prostate cancer and 2 painful metastases of the lumbar spine. Which one of the following therapeutic options is the most appropriate?
Answer: B
Explanation:
Palliative radiotherapy is the treatment of choice for painful bone metastases, including those from prostate cancer. It provides localized pain relief and functional improvement.
Toronto Notes 2023 - Oncology, "Metastatic Bone Pain":
"External beam radiotherapy is first-line treatment for localized bone pain from metastases. Relief occurs within days to weeks." MCCQE1 Objectives (Internal Medicine > Oncology > 52-1):
"Candidates must identify treatment options for symptom control in metastatic cancer, including palliative radiotherapy for painful bone lesions." Androgen deprivation therapy (B, C) treats systemic disease but doesn't address acute pain. Opioids (D) may be used, but radiotherapy provides disease-targeted relief. Intrathecal steroids (A) are not standard for prostate metastases.
NEW QUESTION # 344
A 63-year-old man presents to the office with a 2-year history of episodic swallowing problems that have been increasing in frequency. He states that food seems to stick in his throat, and these episodes are often associated with coughing or regurgitating undigested food. Physical examination reveals that the patient has halitosis; otherwise, findings are normal. Which one of the following is the best next step to confirm the most likely diagnosis?
Answer: D
Explanation:
This presentation is classic for Zenker diverticulum , characterized by progressive dysphagia, regurgitation of undigested food, coughing, and halitosis due to food retention in a pharyngoesophageal pouch. Symptoms are chronic and episodic, often involving regurgitation hours after eating. MCCQE objectives emphasize selecting the safest and most appropriate diagnostic test. The best initial test is a barium swallow (contrast esophagram)
, which clearly visualizes the posterior outpouching above the upper esophageal sphincter.
Endoscopy is not the first step because there is a risk of perforation if a large diverticulum is present. pH monitoring and PPI trials are used for gastroesophageal reflux disease, which does not explain regurgitation of undigested food and halitosis. CT chest is unnecessary for diagnosis.
Therefore, a barium swallow is the safest and most informative investigation to confirm suspected Zenker diverticulum before considering surgical or endoscopic management.
NEW QUESTION # 345
A 60-year-old woman presents with a 7-day history of bloody diarrhea and diffuse mild abdominal tenderness. Stool tests (culture, ova/parasites) are negative. Which one of the following is the best next step?
Answer: E
Explanation:
Persistent bloody diarrhea with negative stool cultures and ova/parasite testing in an older adult suggests inflammatory bowel disease (IBD) or another colitis such as ischemic or microscopic colitis. Colonoscopy is the best next diagnostic step to evaluate for ulcerative colitis, Crohn disease, ischemic colitis, or malignancy.
Toronto Notes 2023 - Gastroenterology, "Inflammatory Bowel Disease":
"Persistent bloody diarrhea with negative infectious work-up should prompt colonoscopic evaluation to rule out IBD or other forms of colitis." MCCQE1 Objectives (Internal Medicine > Gastrointestinal > 47-1):
"Candidates must assess and investigate chronic or persistent diarrhea. In the presence of red flag features such as bleeding, weight loss, or anemia, colonoscopy is indicated." Antibiotics (A) are not indicated with negative stool cultures. Observation (C) and loperamide (D) risk delaying diagnosis. Steroids (E) may be required later but only after confirmation of diagnosis.
NEW QUESTION # 346
A 70-year-old woman had a total abdominal hysterectomy with bilateral salpingo-oophorectomy 2 days ago.
On examination today, her vital signs are as follows: She has been immobile since her operation. She is fatigued but is tolerating a full diet. Which one of the following is the most likely cause of this patient's fever?
Answer: D
Explanation:
Postoperative fever on day 1-2 is commonly caused by atelectasis, particularly in patients who are immobile.
It is considered a self-limited cause of early fever after surgery and often resolves with mobilization and pulmonary exercises.
Toronto Notes 2023 - Surgery, Postoperative Complications:
"The '5 W's' of postoperative fever: Wind (atelectasis), Water (UTI), Wound (infection), Walking (DVT), and Wonder drugs. Atelectasis typically occurs in the first 48 hours and is due to hypoventilation or pain- limited breathing." MCCQE1 Objectives - Surgery > Postoperative Management:
"Candidates must recognize timing-specific causes of postoperative fever. Atelectasis is the most likely cause within the first 48 hours." PE (B) can cause fever but is less likely without respiratory compromise. Wound infection (C) and bowel trauma (D) typically present later or with more specific symptoms. Septic pelvic thrombophlebitis (A) usually presents later and with more systemic signs.
NEW QUESTION # 347
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