Immunoglobulin A Vasculitis in a Patient on Hemodialysis and With a Metastatic Liver Lesion.

We present the case of a 79-year-old man on hemodialysis with immunoglobulin A (IgA) vasculitis. He developed palpable purpura three weeks after having pneumonia. A skin biopsy showed leukocytoclastic vasculitis with IgA and C3 deposition. He received a topical corticosteroid for his IgA vasculitis. He was also diagnosed with a metastatic liver lesion, which was thought to be of colorectal origin because of the elevations in carcinoembryonic antigen and cancer antigen 19-9 levels. The skin biopsy played an important role in the diagnosis of the patient on hemodialysis. Pneumonia and a metastatic liver lesion thought to be from colorectal cancer might be related to the pathogenesis of IgA vasculitis.