Bronchopulmonary endometriosis is a rare cause of hemoptysis. We describe a woman with recurrent hemoptysis during menstruation. The site of origin of hemoptysis was localized on chest CT images. CT appears to be the method of choice for the correct intrapulmonary localization of this disease. The hematogenous spread from the pelvis to the lungs has been proposed for the mechanism for the development of parenchymal pulmonary endometriosis. Thoracic endometriosis is reviewed and new therapeutic modalities are discussed.