Source / episode info

• **Episode:**538
• **Title:**Divine Intervention Episode 538: 2024 USMLE Step 2CK Free 120 Discussion Part 14 (Q111-120, worksheet included)
• **Published:**2024-06-15
• Source:Episode page

One-liner

This episode covers high-yield topics including managing heat rash/malaria rubra, differentiating types of diverticula (Zenker's vs Meckel's), screening for depression post-MI, recognizing pulmonary infarction patterns, diagnosing ruptured AAA, and identifying subacute thyroiditis.

High-yield summary

• Malaria Rubra: A vesicular rash caused by exposure to extreme heat and humidity; management is primarily environmental avoidance (staying cool/dry).
• Zenker's Diverticulum: The most common pharyngeal diverticulum, a false outpouching at Killian's triangle. Symptoms include halitosis and regurgitation of undigested food, requiring prompt surgical intervention (diverticulectomy) after initial swallow therapy.
• Pulmonary Infarction: Characterized by a classic wedge or triangular density pattern on imaging due to vessel branching patterns; strongly associated with hypercoagulable states (e.g., post-surgery, cancer).
• AAA Screening: Guidelines recommend screening men aged 65+ who have smoked, presenting with an abdominal ultrasound if the AAA measures >5.5 cm, is symptomatic, or grows by >1 cm/year.
• Post-MI Depression: Patients who experience MI or stroke are at high risk for depression; screening is crucial because untreated depression significantly increases mortality risk.
• Myelomeningocele: A severe neural tube defect associated with flaccid lower extremities and often leading to a neurogenic bladder, requiring chronic catheterization. Associated with Chiari II malformation.
• Subacute Thyroiditis (De Quervain's): Characterized by painful thyroid tenderness following an infection/surgery; inflammation causes follicular cell rupture, releasing massive amounts of T3/T4, resulting in transient hyperthyroidism. Treatment is NSAIDs to reduce inflammation.

Learning objectives

• Differentiate the clinical presentation and underlying pathology of various types of diverticula (Zenker's vs Meckel's).
• Recognize high-risk populations for vascular emergencies, specifically AAA rupture, and know appropriate screening guidelines.
• Identify the classic signs and mechanisms associated with pulmonary infarction and its risk factors.
• Understand the psychiatric sequelae following major medical events like MI or stroke, including necessary screening protocols.