Source / episode info

• **Episode:**159
• **Title:**Divine Intervention Episode 159 – USMLE Step 2CK Rapid Review Series 18 (IM).
• **Published:**2019-09-24
• Source:Episode page

One-liner

This episode reviews high-yield topics including the most significant risk factors for bladder cancer (medication exposure/schistosomiasis); initial workup of mania in bipolar disorder (UPD); diagnosis and management of opportunistic pneumonia (PCP vs. Legionella); thyroid pathology (PTC, MTC, Hashimoto's); and ethical principles in medicine.

High-yield summary

• Bladder Cancer: The most significant risk factors are Schistosoma haematobium infection (geographical) and exposure to cytotoxic agents like cyclophosphamide, not necessarily remote smoking history.
• Bipolar Disorder/Mania: When evaluating a patient with acute mania, the initial workup must include a urine pregnancy test (UPD) due to the unpredictable nature of the condition.
• Pneumonia: In an immunocompromised host (e.g., on TNF inhibitors), diffuse ground-glass infiltrates and severe hypoxia suggest Pneumocystis jirovecii pneumonia (PCP). Diagnosis requires BAL/bronchoscopy with specific staining.
• Thyroid Cancer: Papillary Thyroid Cancer (PTC) is the most common, associated with prior neck radiation, and classically metastasizes to lymph nodes. Medullary Thyroid Cancer (MTC) is linked to MEN2 syndromes and has calcitonin as its tumor marker.
• Endocrine Ethics: When managing a patient who refuses diagnosis, always prioritize asking why they do not want to know the information before respecting their autonomy.

Learning objectives

• Identify the primary risk factors for bladder cancer beyond smoking history.
• Outline the initial diagnostic steps for acute mania in a reproductive-age female.
• Differentiate between the clinical presentations and causative organisms of PCP pneumonia versus other community-acquired pneumonias (e.g., Legionella).
• Correlate specific genetic syndromes (MEN2) and tumor markers (Calcitonin) with thyroid malignancies.
• Apply ethical principles to patient autonomy when communicating a serious diagnosis.

Board exam buzzwords