A systemic non-thrombocytopenic purpura caused by hypersensitivity vasculitis and deposition of iga-containing immune complexes within the blood vessels throughout the body, including those in the kidney (kidney glomerulus). Clinical symptoms include urticaria; erythema; arthritis; gastrointestinal hemorrhage; and renal involvement. Most cases are seen in children after acute upper respiratory infections.
A systemic, usually self-limited immune complex vasculitis, characterized by immunoglobulin a deposition in the small vessels and kidneys. It is manifested with small hemorrhages in the skin, gastrointestinal symptoms, arthritis, and nephropathy.