Complement factor 2 deficiency: a clinical and serological family study.

D'Cruz, D; Taylor, J; Ahmed, T; Asherson, R; Khamashta, M; Hughes, G R · Ann Rheum Dis · 1992

case_report · Level V

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Abstract

Inherited complement deficiencies are associated with a variety of connective tissue diseases. A family with inherited deficiency of complement factor 2 (C2) is described in which two family members with homozygous C2 deficiency developed cutaneous vasculitis and sicca syndrome. The other family members had heterozygous C2 deficiency and each member had the HLA-A25, B18, DR2 (w15) haplotype. The mother had seropositive rheumatoid arthritis. Further studies showed the presence of cryoglobulins, antibodies against endothelial cells, and anticardiolipin antibodies.

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