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.

Synonyms: Purpura, Anaphylactoid, Anaphylactoid Purpura, Purpuras, Henoch Schonlein, Schonlein Purpura, Henoch, Purpura, Schoenlein Henoch, Nonthrombocytopenic Purpura, Purpura, Allergic, Henoch-Schonlein Purpuras, Purpuras, Schonlein-Henoch, Henoch Schonlein Purpura, Purpura, Nonthrombocytopenic, Schoenlein-Henoch Purpura, Rheumatoid Purpura, Allergic Purpura, Purpura, Schoenlein-Henoch, Purpura, Henoch, Schoenlein Henoch Purpura, Henoch Schonlein Purpuras, Vasculitis, Hemorrhagic, Purpura, Henoch Schonlein, Purpura, Henoch-Schoenlein, Schonlein-Henoch Purpuras, Purpura, Rheumatoid, Nonthrombopenic Purpuras, Schonlein-Henoch Purpura, Purpura Hemorrhagica, Purpuras, Henoch-Schonlein, Nonthrombopenic Purpura, Schonlein Purpuras, Henoch, Hemorrhagic Vasculitis, Purpura, Nonthrombopenic, Purpura, Henoch-Schonlein, Henoch-Schonlein Purpura, Purpura, Schonlein-Henoch, Henoch Schoenlein Purpura, Purpura, Schonlein Henoch, Purpuras, Nonthrombopenic, Henoch Purpura, Henoch-Schoenlein Purpura, Hemorrhagica, Purpura