Phenothiazine-induced systemic lupus erythematosus with superior vena cava syndrome: case report and review of the literature.

Phenothiazine-induced lupus with circulating anticoagulant (CAC) has been reported infrequently, and is rarely associated with significant symptoms. We describe a patient who we suspect had perphenazine-induced lupus erythematosus with CAC. She had recurrent episodes of venous thrombosis and ultimately developed superior vena cava syndrome. The relationships among phenothiazine-induced lupus, CAC, and thrombosis are discussed.