Jeffrey M. Cohen, MD; Alisa N. Femia, MD; Roger S. Ho, MD, MS, MPH
A 30-year-old woman had widespread, erythematous, purpuric macules and papules on the abdomen and extremities. A skin punch biopsy showed extravasated erythrocytes, a neutrophilic infiltrate, fibrinoid necrosis, and broken-down neutrophils releasing nuclear debris. What would you do next?