Interactive case

A 76-Year-Old Woman with Rash and Rapidly Progressive Kidney Failure

Step through a 76-year-old woman’s diagnostic journey — palpable purpura, falling kidney function, a stroke, a new murmur — one finding at a time. Fourteen multiple-choice checkpoints test how you reshape the differential as each piece of data lands.

May 18, 2026 · 18 min · Dr. Sree Hari Reddy MD