<unk>  is characterised by onset of the following clinical symptoms within 24 hours prior to and 72 hours after onset of menses. * Catamenial pneumothorax: this is the most common clinical manifestation, present in 80% of cases. Catamenial pneumothorax is defined as a recurrent pneumothorax that occurs within the first 72 hours after menstruation. It may not necessarily occur with every menstrual cycle and in most cases is one-sided and on the right side. There are cases of catamenial pneumothorax on the left side, and on very rare occasions there may be a bilateral catamenial pneumothorax. Symptoms are the same as for other types of pneumothorax: chest pain, cough and breathlessness. Symptoms are usually mild but there may be severe presentations. * Catamenial hemothorax: this is a rare manifestation of<unk> , occurring in 14% of cases. In almost all cases, the right side is affected but has been one case of a bilateral catamenial hemothorax documented. The most common presenting symptoms are nonspecific and include cough, chest pain and shortness of breath. In some cases, signs may mimic pulmonary embolism. The quantity of blood loss varies, but severe anemia is possible. In almost all cases, chest X-ray shows the presence of pleural effusion without specific characteristics. A CT scan may show additional features such as nodular lesions of the pleura, multiloculated effusions, or bulky pleural masses. * Cyclic haemoptysis: haemoptysis during menstruation is extremely rare, with about 30 case reports in medical literature. Currently, there have been no reports of massive haemoptysis or death. Cyclic haemoptysis is a sign of pulmonary parenchymal<unk> ; ectopic endometrial tissue in the lung responds to cyclical hormonal variation, bleeding along with the normal endometrium located in the uterus. * Pulmonary nodules: nodules are common radiological features in patients with<unk> ; most cases are associated with catamenial haemoptysis. A woman with<unk>  may also have dysmenorrhoea and irregular menses. Complications Pneumothorax and haemothorax are rarely life-threatening. The most common complication is progressive tissue damage or scarring related to inflammation, and in extremely rare cases malignant transformation of the endometrial-like tissue.
Thoracic endometriosis
Cervical thymic cyst
Inguinal lymphadenopathy
Cervical lymphadenopathy
Subphrenic abscess
Lung hernia
Paraproctitis
Diaphragmatic hernia