MCCQE Exam Dumps - Medical Council of Canada Qualifying Examination Part 1 Exam

This patient requires antihypertensive therapy for persistent mild hypertension. He previously developed tongue swelling on ramipril , consistent with ACE inhibitor–induced angioedema , which is a contraindication to further ACE inhibitor use (e.g., enalapril). MCCQE objectives emphasize avoiding re-exposure to ACE inhibitors after angioedema due to risk of recurrence, which can be life-threatening.

Beta-blockers such as metoprolol are not first-line for uncomplicated hypertension and should be used cautiously in patients with asthma due to risk of bronchospasm (even though cardioselective agents are safer, alternatives are preferred). Clonidine and hydralazine are not first-line agents for chronic management due to side effects and rebound hypertension risk.

A thiazide diuretic (hydrochlorothiazide) is an appropriate first-line therapy for uncomplicated hypertension. Thiazides have strong evidence for cardiovascular risk reduction and are suitable in patients without contraindications.

Thus, hydrochlorothiazide is the most appropriate initial therapy in this patient.

The patient has chronic non-cancer pain with comorbid PTSD and alcohol misuse — high-risk factors for opioid use disorder. Before any opioid prescribing, a comprehensive interdisciplinary approach including mental health and substance use support is essential.

Toronto Notes 2023 – Pain Management and Addiction Medicine:

“In chronic pain patients with substance use or mental health comorbidities, refer to addiction/mental health services before considering opioid therapy.”

MCCQE1 Objectives (ELOM > 99-4: Safe Prescribing):

“Candidates must assess for substance use risk factors and manage chronic pain using a multidisciplinary approach.”

Imaging (A) is unlikely to alter management. Opioids (B, C) should not be first-line in this context. Cannabis (E) is not first-line and lacks robust evidence in complex chronic pain.

This child presents with “red flag” features for malignancy: a firm, fixed, nontender supraclavicular lymph node > 2 cm in size, with associated hepatosplenomegaly and night sweats. These features are most concerning for lymphoma.

Toronto Notes 2023 – Pediatrics, “Lymphadenopathy in Children”:

“Malignant lymphadenopathy tends to be firm, fixed, painless, and located in supraclavicular areas. Systemic signs (fever, weight loss, hepatosplenomegaly, night sweats) are concerning for lymphoma.”

MCCQE1 Objectives (Pediatrics > 78-3: Hematology/Oncology):

“Candidates should differentiate between benign and malignant lymphadenopathy and recognize features suggestive of lymphoma.”

Cat-scratch disease (B) is usually tender and associated with cat exposure. Kawasaki disease (C) presents with fever and mucocutaneous findings. Acute bacterial lymphadenitis (D) is painful, warm, and rapid in onset. Viral lymphadenopathy (E) is often bilateral, small, and tender.

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Retropharyngeal abscess is most likely because the child is toxic-appearing with very high fever (40.2°C), sore throat, drooling, muffled “hot potato” voice, and stridor with progressively worsening respiratory distress over about 24 hours. In toddlers, retropharyngeal lymph nodes can become infected following an upper respiratory or pharyngeal infection and form an abscess, causing posterior pharyngeal swelling that obstructs the airway and makes swallowing painful, leading to drooling. Croup typically presents with a barking cough and hoarseness, usually with low-grade fever; drooling and muffled voice suggest a deeper space infection rather than viral laryngotracheitis. Foreign body aspiration usually has sudden onset and often lacks fever. Laryngomalacia is a chronic infant condition (not acute, febrile illness). Bronchiolitis causes wheeze/crackles rather than prominent stridor and drooling. MCCQE priorities are airway-first management (minimize agitation, be prepared for a difficult airway), then prompt IV antibiotics and urgent ENT assessment for possible drainage.

This presentation suggests hereditary hemochromatosis. Common features include hyperpigmentation ( " bronze diabetes " ), hepatomegaly, diabetes, fatigue, and elevated liver enzymes. Serum ferritin is a screening test for iron overload, and elevated levels support the diagnosis.

Toronto Notes 2023 – Endocrinology / Gastroenterology:

“Hemochromatosis presents with skin hyperpigmentation, hepatomegaly, diabetes, fatigue. Diagnosis begins with serum ferritin and transferrin saturation.”

MCCQE1 Objectives (Internal Medicine > Metabolic and Endocrine > 37-1):

“Candidates must investigate iron overload syndromes using ferritin and transferrin saturation.”

Cortisol (B) is for adrenal insufficiency. A1AT (C) is a liver disease cause but not typical here. Amylase (E) is for pancreatitis. A1c (A) would confirm diabetes but not the underlying cause.

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Comprehensive and Detailed Explanation:

Middle-aged to older men with social isolation and substance use disorders (especially alcohol) are among the highest-risk groups for completed suicide. They are less likely to seek help and often use more lethal methods.

Toronto Notes 2023 – Psychiatry, “Suicide Risk Assessment”:

“High-risk demographics include older men, social isolation, comorbid alcohol use, and chronic illness. These patients have the highest rates of completed suicide.”

MCCQE1 Objectives (Psychiatry > 71-1: Suicide Risk):

“Candidates must recognize epidemiologic risk factors for completed suicide, including demographics and comorbidities.”

Although women and youth have higher rates of suicidal ideation and attempts, men over 50 have the highest completion rates.

This patient’s presentation—knee effusion with a soft tissue mass in the popliteal fossa following exertion—is classic for a Baker (popliteal) cyst , which represents distention of the gastrocnemius–semimembranosus bursa, often associated with intra-articular pathology (e.g., meniscal injury or osteoarthritis). MCCQE objectives emphasize selecting the least invasive, most appropriate imaging modality to confirm suspected cystic lesions.

Ultrasound is the best initial diagnostic test because it is noninvasive, readily available, and highly sensitive for distinguishing a cystic structure from a solid mass or vascular pathology (e.g., popliteal artery aneurysm or deep vein thrombosis). It can also assess for complications such as cyst rupture.

Arthroscopy is invasive and not required for diagnosis. Arthrocentesis evaluates joint effusion but does not confirm a popliteal cyst. Aspiration of the mass without imaging is inappropriate due to risk of vascular injury. CT is unnecessary and exposes the patient to radiation.

Therefore, ultrasound is the preferred method to confirm a Baker cyst.

This presentation is most consistent with amyotrophic lateral sclerosis (ALS), characterized by progressive degeneration of both upper motor neurons (UMN) and lower motor neurons (LMN). The patient has LMN signs in the upper limbs—muscle atrophy of the shoulder girdle and visible fasciculations—alongside UMN signs—hyperreflexia, ankle clonus, and a Babinski reflex. The combination of UMN and LMN findings in multiple body regions with a gradual, progressive course over months strongly supports ALS. Multiple sclerosis typically produces disseminated neurologic deficits separated in time and space and does not usually cause prominent fasciculations or progressive LMN wasting. Cerebellar degeneration causes ataxia, dysmetria, and gait instability rather than mixed UMN/LMN signs. A pontine astrocytoma would more often cause cranial nerve deficits and brainstem signs and is less likely to present as a diffuse, progressive mixed motor neuron syndrome in an older adult. Parkinson disease causes bradykinesia, rigidity, and resting tremor, not Babinski or fasciculations. MCCQE objectives emphasize recognizing mixed UMN/LMN patterns and identifying ALS as a key progressive motor neuron disorder.