Source / episode info
- **Episode:**245
- **Title:**Divine Intervention Episode 245 – USMLE Step 2CK Rapid Review Series 39.
- **Published:**2020-07-03
- Source:Episode page
One-liner
This rapid review covers key board topics including the diagnosis and management of septic arthritis, detailed guidelines for cervical cancer screening, initial treatment protocols for superior vena cava syndrome, differentiating fibrate (PPAR-) from TZD (PPAR-) drug mechanisms, identifying membranous nephropathy in nephrotic syndrome, and interpreting oxygen saturation gradients across cardiac defects.
High-yield summary
- Septic Arthritis: Diagnosis requires joint aspiration (arthrocentesis). The key clinical differentiator is that pain/inflammation is localized over a joint, whereas osteomyelitis involves tenderness over the bone itself.
- SVC Syndrome: High suspicion in lung cancer (especially small cell lung carcinoma) presenting with facial plethora, headache, and jugular venous distention. Initial management priority is radiation therapy to relieve compressive symptoms, not chemotherapy or steroids alone.
- Dyslipidemia Drugs: Fibrates activate PPAR- (best for lowering triglycerides). TZDs (e.g., Pioglitazone) activate PPAR-. Do NOT use TZDs in patients with Congestive Heart Failure (CHF) due to risk of fluid retention/volume overload.
- Nephrotic Syndrome: The most common cause of thrombosis is Membranous Nephropathy, which leads to the loss of plasma proteins, notably Antithrombin III, thereby impairing natural anticoagulation and promoting clotting.
- Cervical Screening: Guidelines are complex: screening stops at age 65 unless there is a history of high-grade dysplasia (CIN) or previous cervical lesion resection, in which case monitoring may need to continue for 20 years.
Learning objectives
- Differentiate the clinical presentation and diagnostic workup of septic arthritis versus osteomyelitis.
- Outline the initial management strategy for Superior Vena Cava Syndrome, recognizing its association with small cell lung cancer.
- Compare the mechanisms of action and contraindications of fibrates (PPAR-\alpha agonists) and thiazolidinediones (PPAR-\gamma agonists).
- Identify the specific nephrotic syndrome associated with hypercoagulability due to Antithrombin III deficiency.
- Interpret oxygen saturation gradients across cardiac defects (ASD vs. VSD).
Board exam buzzwords