Source / episode info

• **Episode:**283
• **Title:**Divine Intervention Episode 283 – Combo Podcast (Risk Factors/Prognostic Factors) + Step 2CK Rapid Review (Series 47) + Step 2CK Course Reminder.
• **Published:**2021-01-14
• Source:Episode page

One-liner

This episode provides a rapid review of high-yield topics including RCC risk factors and metastasis patterns, the pathophysiology of AERD via leukotriene shunting, differentiating Methemoglobinemia from G6PD deficiency, and mastering alternate nomenclature for conditions like MCLNS and osteogenic sarcoma.

High-yield summary

• RCC: Smoking is a major risk factor; involvement of the renal vein (IVC drainage) significantly worsens prognosis. Metastasis most commonly occurs in the lungs.
• Methemoglobinemia: Caused by powerful oxidizing agents (e.g., nitrates, Dapsone). Treatment of choice is Methylene Blue. Differentiation from G6PD deficiency relies on recognizing that MetHb can cause profound cyanosis and is often triggered by drugs like nitrates.
• AERD Pathophysiology: Aspirin irreversibly inhibits COX-1/COX-2 -> shunts arachidonic acid metabolism to the Lipoxygenase (LO) pathway -> excessive formation of potent bronchoconstrictors (Leukotrienes). Treatment targets leukotriene receptors or LOX inhibition.
• OSA Risk Factors: In children, tonsillar hypertrophy is key; in adults, obesity is the primary risk factor. If AERD/asthma history exists, nasal polyposis must be considered.
• Cancer Synonyms (NBME Traps): Be aware of alternate names: Mucocutaneous Lymph Node Syndrome (MCLNS) for Kawasaki's disease; Osteogenic sarcoma for osteosarcoma; Spinal dysraphism for neurotube defect; Lipoid nephrosis for nephrotic syndrome.

Learning objectives

• Identify key risk factors, clinical presentations, and prognoses associated with Renal Cell Carcinoma (RCC).
• Differentiate the pathophysiology and treatment of Methemoglobinemia from G6PD deficiency.
• Explain the mechanism linking aspirin use to leukotriene overproduction in Aspirin Exacerbated Respiratory Disease (AERD).
• Recognize alternate nomenclature used on board exams for common conditions (e.g., MCLNS, osteogenic sarcoma).
• Apply knowledge of risk stratification for Obstructive Sleep Apnea (OSA) based on age and comorbidities.

Board exam buzzwords