Aspirin induced leukocytoclastic vasculitis, lower gastrointestinal hemorrhage and acute renal failure [mimicking systemic vasculitis]

This is a case of a 60-year-old gentleman who presented with an extensive cutaneous vasculitic rash [leukocytoclastic] with lower gastrointestinal bleeding following a small dose of aspirin [81 mg]. The aspirin was stopped immediately. Three weeks later, he had acute renal failure, which was initially thought to be secondary to systemic vasculitis, but proved to be acute renal tubular necrosis as a delayed reaction to aspirin