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Table 2 Schwarz criteria for the diagnosis of hypocomplementemic urticarial vasculitis

From: A case report of hypocomplementemic urticarial vasculitis presenting with membranoproliferative glomerulonephritis

Major criteria

Chronic urticaria for more than 6 months

 

Hypocomplementemia

Minor criteria

Leukocytoclastic vasculitis on skin biopsy

 

Arthralgias or arthritis

 

Ocular inflammation

 

Glomerulonephritis

Modified by

Abdominal pain

Schwarz et al. [5]

Low C1q with positive anti-C1q antibodies