Expression of CA125 in thoracic endometriosis in a patient with catamenialpneumothorax

A 40-year-old woman had experienced monthly right thoracic pain and product ive cough occurring at the beginning of her menstrual period. X-ray finding s indicated a diagnosis of catamenial pneumothorax, The serum CA125 level w as very high at 159.6 U/ml. Thoracoscopy showed multiple dark cherry-colore d nodules with neovascularization on the diaphragm, Following partial resec tion of the diaphragm thoracic endometriosis was diagnosed. Immunohistochem ical staining of these endometrial cells showed antibodies to CA125, She ha s been well without recurrence for 15 months, and her serum CA125 level was within the normal range after operation.