Lupus masquerading as CAPD peritonitis.

Abdominal serositis and mesenteric vasculitis are complications of SLE. We report a case of SLE presenting as abdominal pain in a CAPD patient. Lupus serositis/mesenteric vasculitis should be considered in the differential diagnosis of a CAPD patient with SLE who presents with abdominal pain but benign cell counts and cultures. This is especially important since untreated mesenteric vasculitis can lead to bowel perforation and death.