Surgical experience on patients with serum lupus anticoagulants. A report of two cases.

Lupus anticoagulants (LA) are antiphospholipid IgG, IgM, or IgA auto antibodies. When LAs are present, a prolongation of activated partial thromboplastin time is usually found and arteriovenous thrombosis is likely to occur during or after surgery. We report here two LA-positive cases (a 29-year-old male taking chlorpromazine for schizophrenia, and a 44-year-old female diagnosed as systemic lupus erythematosus) who underwent surgical procedures without complications.