Acute hemorrhagic edema of infancy: case report.

Acute hemorrhagic edema of infancy (AHEI) is a benign form of leukocytoclastic vasculitis that typically affects children between 4 and 24 months of age. The etiology remains unknown. The potential triggers of AHEI include preceding bacterial or viral infections, immunizations and drugs. The onset of AHEI is often dramatic with petechiae, ecchymoses, and annular, nummular or targetoid purpuric lesions usually appearing on the extremities, face, or ears. We report on a case of AHEI that occurred after upper respiratory tract infection.