Pass the Medical Council of Canada MCCQE Part 1 MCCQE Questions and answers with ValidTests

Early identification of sensorineural hearing loss through universal newborn screening enables early intervention (e.g., cochlear implants, speech therapy), which can result in near-normal language development.

Toronto Notes 2023 – Pediatrics, Hearing Loss:

“Children diagnosed early with bilateral hearing loss and provided with appropriate intervention (e.g., amplification or implants) can achieve normal speech and language milestones.”

MCCQE1 Objectives – Pediatrics > Development & Communication Disorders:

“Candidates must understand the importance of early detection and intervention in congenital hearing loss and its impact on speech and literacy outcomes.”

Other options (A–C, E) are outdated or overly pessimistic. Current evidence supports favorable outcomes with early diagnosis and management.

Comprehensive and Detailed Explanation:

An estimated fetal weight below the 5th percentile at 30 weeks is concerning for intrauterine growth restriction (IUGR). This warrants prompt evaluation of fetal well-being via biophysical profile and Doppler assessment. The patient should be referred for further fetal assessment immediately to rule out placental insufficiency or other complications.

Toronto Notes 2023 – Obstetrics, “Fetal Growth Restriction”:

“EFW < 10th percentile, especially < 5th, warrants further evaluation including Doppler studies and biophysical profile. Immediate assessment is warranted to determine fetal well-being.”

MCCQE1 Objectives (Obstetrics > 80-4: Antepartum Surveillance):

“Candidates must initiate urgent assessment in cases of abnormal fetal growth to reduce perinatal morbidity.”

Delaying care (B) is inappropriate. Reassurance (A) is unsafe. ASA (D) is preventative, not corrective. Doppler (E) is important but should be coordinated through obstetrical triage.

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The highest priority is the immediate safety of the patient and her child. In the presence of domestic violence, risk assessment for harm or neglect must be conducted urgently, particularly since a child may be at risk. Safety trumps psychiatric or social evaluations in triage.

Toronto Notes 2023 – Psychiatry, “Crisis and Risk Assessment” Section:

“When intimate partner violence (IPV) is disclosed, it is critical to assess immediate safety and consider mandatory reporting, especially when children are involved.”

MCCQE1 Objectives (Psychiatry > 79-6: Violence and Abuse):

“Candidates must assess for and respond to risk of harm in situations of domestic violence, especially when dependents are involved. This includes ensuring immediate safety and following legal obligations for child protection.”

Although the other concerns (e.g., gambling, depression, substance use, financial need) are valid, the presence of violence makes D the first and most urgent priority.

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Chronic mesenteric ischemia (also known as “intestinal angina”) presents as postprandial abdominal pain, leading to food avoidance and significant weight loss. GI exams may be normal. Imaging (e.g., angiography or CT angio) confirms the diagnosis.

Toronto Notes 2023 – Gastroenterology, “Chronic Mesenteric Ischemia”:

“Classic triad: postprandial abdominal pain, weight loss, and food aversion. Physical exam and GI series may be normal.”

MCCQE1 Objectives (Gastroenterology > 47-1: Abdominal Pain):

“Candidates must suspect mesenteric ischemia in older adults with risk factors and postprandial pain leading to weight loss.”

PUD (A) usually causes epigastric pain relieved by food. Cholelithiasis (B) causes RUQ pain. Colon cancer (D) presents with altered bowel habits or bleeding. Mesenteric adenitis (C) occurs in younger patients, often with infection.

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This presentation is consistent with acute acalculous cholecystitis, often seen in critically ill or post-MI patients. If unresponsive to antibiotics, percutaneous cholecystostomy is the preferred next step in those who are poor surgical candidates.

Toronto Notes 2023 – General Surgery, “Hepatobiliary Disorders” Section:

“Acalculous cholecystitis occurs in critically ill patients and is often managed with percutaneous cholecystostomy if the patient is not a candidate for surgery.”

MCCQE1 Objectives (Surgery > 84-3: Biliary Disease):

“Candidates must be able to diagnose and manage acalculous cholecystitis. Management includes antibiotics and drainage via percutaneous cholecystostomy in unstable patients.”

Laparoscopic cholecystectomy (C) is standard but not suitable in acutely ill ICU patients. Broadening antibiotics (A) alone is insufficient after failure of initial therapy. ERCP (B) is for biliary obstruction or cholangitis. HIDA scan (E) is diagnostic, not therapeutic.

In cases of blunt testicular trauma with inability to palpate the testicle due to hematoma, scrotal ultrasonography is the first-line investigation to assess for testicular rupture or other injury.

Toronto Notes 2023 – Urology, “Testicular Trauma”:

“Scrotal ultrasound is the investigation of choice to assess for testicular rupture, hematoma, or torsion. Early imaging is critical if testis is non-palpable or if hematoma is significant.”

MCCQE1 Objectives (Surgery > 51-2: Genitourinary Trauma):

“Candidates must investigate testicular trauma using ultrasound to rule out rupture or torsion.”

Exploration (B) is done if ultrasound confirms rupture. Observation or discharge (A, E) without imaging risks missing serious injury.

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Children with a first-degree relative who has premature coronary artery disease or hypercholesterolemia should undergo fasting lipid screening between ages 2–10. Since the child is 10, screening is indicated.

Toronto Notes 2023 – Pediatrics, “Preventive Care in Children”:

“Lipid screening is recommended for children ≥2 years old with a family history of early cardiovascular disease or hypercholesterolemia.”

MCCQE1 Objectives (Pediatrics > 78-1: Preventive Medicine):

“Candidates must screen children at high risk of cardiovascular disease appropriately, including lipid profile for familial hyperlipidemia.”

Diet and exercise counseling may follow screening, but testing is the first step. Reassurance alone (C) is inappropriate. Homocysteine (E) and HbA1c are not first-line tests in this setting.

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This patient presents with hypotension, diffuse abdominal pain, and a history of contact sports injury with preceding symptoms of infectious mononucleosis (sore throat, fatigue). The spleen is commonly enlarged in mononucleosis, making it vulnerable to rupture after even minor trauma.

Toronto Notes 2023 – General Surgery and Infectious Diseases Sections:

“Splenic rupture is a known complication of mononucleosis, particularly after trauma. Symptoms may include diffuse abdominal pain, hypotension, and signs of hemorrhagic shock.”

MCCQE1 Objectives (Surgery > 84-1: Abdominal Trauma):

“Candidates should identify splenic rupture as a cause of hypotension and abdominal pain following blunt abdominal trauma, especially in patients with splenomegaly.”

Appendicitis (B) would present with localized right lower quadrant pain. Pneumonia (C) and pyelonephritis (D) would present with respiratory or urinary symptoms. Ruptured duodenum (E) is much less likely without specific trauma to that region or signs of peritonitis.

This patient is competent and capable of making his own health decisions. A DNR order and naming a substitute decision-maker apply only when a patient lacks capacity. The next step is to discuss the suspected diagnosis with the patient and explore his preferences.

Toronto Notes 2023 – ELOM, Consent and Capacity:

“Competent patients retain full decision-making authority. Substitute decision-makers are only engaged when the patient lacks capacity. DNR applies to resuscitation, not other medical decisions.”

MCCQE1 Objectives – ELOM > Capacity, Consent, Advance Directives:

“Candidates must recognize that capable patients should be directly involved in decisions. Substitute decision-makers are not invoked unless the patient is incapable.”

Option A implies a breach of confidentiality without permission. Option C is premature. Option D bypasses informed consent. Option E misinterprets the DNR’s scope.

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This patient has classic features of exertional heat stroke—hyperthermia, hypotension, CNS symptoms (collapse), and hot, dry skin. A key complication of heat stroke is rhabdomyolysis, which can cause renal failure. Serum creatine kinase (CK) is the best next diagnostic step to confirm muscle breakdown.

Toronto Notes 2023 – Emergency Medicine, “Environmental Exposures”:

“In heat stroke, check for rhabdomyolysis (↑CK), renal impairment, and coagulopathy. Prompt cooling and hydration are critical.”

MCCQE1 Objectives (Internal Medicine > 59-3: Environmental and Toxic Exposures):

“Candidates must recognize heat-related illnesses and investigate for complications such as rhabdomyolysis and acute kidney injury.”

CT head (C) is not indicated unless persistent neurological symptoms. TSH (B), CRP (D), and blood cultures (E) are irrelevant to acute exertional hyperthermia.

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