Table 2.

Diagnostic criteria of HSP (ACR and EuLAR & PReS) [8, 9].

EuLAR/PReS criteria—2006 [3]	American College of Rheumatology criteria—1990 [4]
Mandatory criterion:
(i) Palpable purpura	Three or more of the following criteria are needed:
Plus at least one of the following criteria:
(1) Diffuse abdominal pain	(1) Age 20 years or less at disease onset
(2) IgA deposition in any biopsy	(2) Palpable purpura
(3) Arthritis/arthralgias	(3) Acute abdominal pain with gastrointestinal bleeding
(4) Renal involvement (hematuria and/or proteinuria)	(4) Biopsy showing granulocytes in the walls of small  arterioles or venules in superficial layers of skin