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

Given the lack of prenatal care, the mother ' s withdrawal, and prior involvement of child protection services, a newborn drug screen is warranted to assess for possible in utero exposure. This is part of the safety assessment.

Toronto Notes 2023 – Pediatrics, Newborn Assessment:

“Infants born to mothers with no prenatal care or prior social concerns should undergo a full newborn screening, including toxicology if indicated.”

MCCQE1 Objectives – Pediatrics > Newborn Care and Social Issues:

“Candidates must identify social risk factors and initiate appropriate newborn evaluations, including toxicology screens when substance use is suspected.”

The mother was previously immune to hepatitis B, so (A) is not immediately required. Skin-to-skin care (D) is beneficial but secondary to screening in this context. Donor milk (B) is not indicated unless breastfeeding is contraindicated.

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Comprehensive and Detailed Explanation:

Sexual dysfunction, including anorgasmia, is a common side effect of SSRIs like escitalopram. Bupropion, a norepinephrine-dopamine reuptake inhibitor, has minimal sexual side effects and can be safely added to mitigate this issue while preserving the antidepressant effect.

Toronto Notes 2023 – Psychiatry / Pharmacology:

“SSRI-induced sexual dysfunction can be managed by dose reduction, switching agents, or adding bupropion.”

MCCQE1 Objectives (Psychiatry > 71-1: Depressive Disorders):

“Candidates should be able to address side effects of antidepressants, including sexual dysfunction, and adjust therapy appropriately.”

Increasing the dose (A) may worsen sexual dysfunction. Venlafaxine (B), an SNRI, also has sexual side effects. D (no change) does not address the patient ' s concern.

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This ABG reveals primary respiratory acidosis (↓pH, ↑PaCO₂, normal HCO₃), likely from hypoventilation due to postoperative pain, sedation, or narcotics. PaO₂ is also low, suggesting inadequate oxygenation.

Toronto Notes 2023 – Respiratory, “Postoperative Respiratory Complications”:

“Postoperative respiratory acidosis results from hypoventilation, often due to pain, sedatives, or poor respiratory effort. Assess airway, breathing, and support oxygenation.”

MCCQE1 Objectives (Internal Medicine > 44-3: Acid-Base Disturbances):

“Candidates must recognize respiratory acidosis on ABG and relate findings to common postoperative complications.”

Metabolic acidosis (C) would show ↓HCO₃. Compensated alkalosis (D) would show opposite ABG changes. Hypermetabolic states increase respiratory drive, not decrease it.

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.

Orchiopexy is the treatment of choice for cryptorchidism and should be performed between 6–18 months of age. Early surgery improves fertility outcomes and reduces malignancy risk.

Toronto Notes 2023 – Pediatrics, Urology:

“Undescended testes should be referred for orchiopexy ideally before 18 months of age. Observation beyond 6 months is not recommended.”

MCCQE1 Objectives – Pediatrics > Genitourinary Disorders:

“Candidates must recognize and refer for cryptorchidism early to optimize testicular function and reduce cancer risk.”

Hormonal therapies (C, D) are not recommended due to limited efficacy. Observation (A) is too late beyond

An empty uterus with β-hCG > 1500–2000 IU/L raises concern for a pregnancy of unknown location (PUL), including the possibility of ectopic pregnancy. However, the patient is hemodynamically stable and asymptomatic. In such cases, the best initial step is to repeat serum β-hCG in 48 hours to assess the rise or fall of hCG levels.

Toronto Notes 2023 – Obstetrics, " First Trimester Bleeding " :

“If β-hCG > 1500 IU/L and no intrauterine pregnancy is visualized on ultrasound, repeat β-hCG in 48 hours to determine rise or decline. A suboptimal rise (less than 66%) suggests ectopic pregnancy.”

MCCQE1 Objectives (Obstetrics > 79-1: Early Pregnancy Complications):

“In a patient with early pregnancy bleeding, the candidate must interpret quantitative β-hCG trends to distinguish ectopic pregnancy, miscarriage, or viable intrauterine pregnancy.”

Immediate administration of methotrexate or invasive procedures such as D & C or laparoscopy are not appropriate until further diagnostic clarification is obtained.

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This constellation of features—hypotonia, macroglossia, brachycephaly, single palmar crease, short broad hands with clinodactyly—is classic for Down syndrome (Trisomy 21).

Toronto Notes 2023 – Pediatrics, “Genetic Syndromes”:

“Trisomy 21 features include hypotonia, upslanting palpebral fissures, epicanthic folds, flat nasal bridge, brachycephaly, macroglossia, single palmar crease, and clinodactyly.”

MCCQE1 Objectives (Pediatrics > 78-3: Congenital and Genetic Disorders):

“Candidates must recognize key dysmorphic features associated with common genetic syndromes including Trisomy 21.”

Prader-Willi and congenital hypothyroidism may have hypotonia but lack the full phenotypic pattern. Turner syndrome is seen in females with short stature and webbed neck. Fetal alcohol syndrome presents with smooth philtrum and microcephaly.

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This patient is currently non-communicative and therefore likely lacks decision-making capacity. MCCQE ethics objectives emphasize that when a patient’s prior capable wishes are clearly known, clinicians must follow those expressed values and directives. He previously stated he did not want life-prolonging measures; escalation (hospital transfer) and potentially curative treatment aimed primarily at prolonging life would conflict with that directive. The immediate best step is to provide comfort-focused care, addressing symptoms such as fever and distress with antipyretics and other palliative measures.

Calling family to “consider antibiotics” risks substituting others’ preferences for the patient’s known wishes; substitute decision makers are meant to apply the patient’s prior expressed wishes, not override them. Starting antibiotics while waiting to contact family similarly risks initiating life-prolonging therapy inconsistent with the directive. Catheter change may be clinically useful in catheter-associated infection, but the question frames a clear limit on life-prolonging interventions; symptom relief is the priority. Ongoing care should include reassessment of comfort, clear documentation of goals of care, and communication with family about the patient’s previously stated wishes and the plan for palliative management.

The levonorgestrel-releasing intrauterine system (LNG-IUS) is the first-line treatment for heavy menstrual bleeding, particularly in women with risk factors for endometrial hyperplasia and contraindications to systemic hormones (e.g., morbid obesity, diabetes, OSA).

Toronto Notes 2023 – Gynecology, “Abnormal Uterine Bleeding” Section:

“The LNG-IUS is highly effective in reducing menstrual bleeding and improving hemoglobin levels. It is particularly recommended in women with obesity, chronic anovulation, or contraindications to estrogen.”

MCCQE1 Objectives (Obstetrics and Gynecology > 82-1: Abnormal Uterine Bleeding):

“Candidates must consider the LNG-IUS as a preferred non-surgical treatment for chronic heavy menstrual bleeding when endometrial pathology has been excluded.”

Oral contraceptives (C) are not first-line in morbid obesity due to increased thromboembolic risk. Cyclic medroxyprogesterone (D) is less effective than LNG-IUS. Hysterectomy (A) is definitive but should follow failure of conservative therapy.

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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