A case of endometriosis of the lung treated with danazol.

A 25-year-old Japanese woman, complaining of catamenial hemoptysis and severe cough complicated with menorrhalgia, was diagnosed as having pulmonary and pelvic endometriosis. She was treated with danazol for 20 weeks. Significant improvement of her condition was achieved during the treatment period. Catamenial hemoptysis recurred at the first menstruation after termination of the treatment. Readministration of danazol was refused. Therefore, surgical removal of the affected lobe of the right lung was performed. Cases of this rare disorder are reviewed.