Three of the following five criteria were required to meet American College of Rheumatology (ACR) classification criteria for hypersensitivity vasculitis:

1. Age at disease onset older than 16 years
2. Medication at disease onset as a precipitating factor
3. Palpable purpura
4. Maculopapular rash
5. Biopsy specimen showing granulocytes around an arteriole and venule

These criteria have a reported sensitivity of 71% and a reported specificity of 83.9% for the classification of hypersensitivity vasculitis compared with other vasculitides.

Litteratur

• Calabrese, 1990
• Urtikarielle vaskulitter og HUVS her (VASKULITT.no)