Clinical manifestations of IgA vasculitis
關節、肚子、腎、皮
Palpable purpura
on extensor surfaces (lower extremity first) & buttocks
Polyarthralgias
(nondeforming) esp. involving hips, knees, & ankles
Colicky abdominal pain
± GIB or intussusception
Nephritis
ranging from microscopic hematuria & proteinuria to ESRD