_:vb50947504 . _:vb50947504 . _:vb50947504 . _:vb50947504 "A hypersensitivity vasculitis that is characterized by purpura (purplish plaques), arthralgia, gastrointestinal upset, and/or glomerulonephritis, and may be related to increased immune response following an infection."^^ . _:vb50947504 . _:vb50947504 "url:https://rarediseases.info.nih.gov/diseases/8204/henoch-schonlein-purpura"^^ . _:vb50947504 .