Source / episode info
- **Episode:**582
- **Title:**DIP Ep 582: USMLE Step 2/3 Rapid Review Series 120
- **Published:**2025-03-17
- Source:Episode page
One-liner
This episode provides a high-yield review of board-relevant associations, including DiGeorge Syndrome's associated cardiac defects and hypoparathyroidism, maternal diabetes complications (hypoglycemia/hypokalemia), congenital anomalies like Trisomy 18 and Down syndrome, and the screening guidelines for autoimmune conditions.
High-yield summary
- DiGeorge Syndrome: Caused by failure of the third and fourth pharyngeal pouches to form, leading to parathyroid and thymus hypoplasia/aplasia. Clinical triad includes cardiac defects (e.g., Tetralogy of Fallot), hypocalcemia, and T-cell deficiency (SCID risk).
- Maternal Diabetes Mellitus: Increases the risk of congenital anomalies (VSD) and causes neonatal complications: hypoglycemia (due to prolonged hyperinsulinemia) and hypokalemia (due to insulin activating the Na+/K+ ATPase pump, driving K+ intracellularly).
- Congenital Anomalies: Must recognize physical signs like "rocker bottom feet" (Trisomy 18), transverse palmar crease (Down Syndrome), and fused lower extremities (Syaroga Milia/Vascular Ring).
- Autoimmune Myopathies: Dermatomyositis requires screening for associated malignancies (e.g., lung, ovarian, GI) based on age; MG is strongly associated with thymoma.
- Renal Toxicity: The combination of NSAIDs/Aspirin + Carbonic Anhydrase Inhibitors (ACIs) + Angiotensin Receptor Blockers (ARBs) significantly increases the risk of acute kidney injury due to profound vasoconstriction and impaired renal perfusion.
Learning objectives
- Identify the key clinical manifestations and associated screening tests for DiGeorge Syndrome (DGS).
- Understand the metabolic derangements and complications arising from maternal diabetes mellitus in neonates.
- Recognize classic physical exam findings associated with common congenital syndromes (e.g., Down syndrome, Trisomy 18).
- Correlate autoimmune conditions (MG, Dermatomyositis) with underlying organ pathology and necessary cancer screenings.
- Analyze the risk factors for acute kidney injury when combining multiple classes of nephrotoxic drugs.
Board exam buzzwords