Abstract
A 52-year-old woman was pointed out pneumothorax by medical examination of health promotion and admitted to our hospital. She has complained of a history of right chest pain with menstruation before this episode. The Chest X-ray findings showed right pneumothorax, and laboratory studies showed elevated CA125 in the serum. Preoperative findings suggested catamenial pneumothorax, and we performed surgical treament on the next day of the next estimated menstrutation. Thoracoscopy revealed a small bloody pleural effusion and multiple fistulas in the central tendon of the diaphgram. The diaphgram was excised with staples. Systemic hormone therapy was not done because of her age. The patient has been doing well during the two-year follow up period without recurrence. We herein report a very rare case of catamenial pneumothorax in an over 50-year-old woman.