title: Nailfold capillary abnormalities in Henoch-Schönlein purpura.
mesh_terms: D000293:Adolescent; D002196:Capillaries / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D011695:IgA Vasculitis / Q000473:pathology*; D007223:Infant; D009262:Nails / Q000098:blood supply*