Table 1 Criteria for case definition of Henoch-Schönlein purpura

Palpable purpuric eruption and at least one additional criteria are required for diagnosis.

REQUIRED CRITERIONADDITIONAL CRITERIA
Palpable purpuric eruptionDiffuse abdominal pain
Arthritis or arthralgia
Renal involvement (hematuria or proteinuria)
A biopsy showing predominant IgA deposition, mostly in the arterioles, capillaries, and venules of the skin, GI tract, or kidneys

  • GI—gastrointestinal.

  • Adapted from Dillon.2