HS purpura was first recognized by Heberden in 1801.
An association between purpura and arthritis was described by Schonlein in 1837.
HS purpura is a small vessel vasculitis whose major manifestations include :
One of the most common vasculitis of childhood.
Considered to be self-limiting.
Can continue to cause lifelong problems is
Slightly raised “palpable hemorrhagic skin lesions.
Not related to thrombocytopenia.
Age < 20 onset of first symptoms
Diffuse abdominal pain
Worse after meals
Diagnostic bowel ischemia(usually including diarrhea)
Histologic changes(wall granulocytes) in the walls of arterioles or venules.
※A patient shall be said to have HS purpura if at least 2 of 4 criteria are present. (sensitivity : 87.1% / specificity : 87.7%)