<![CDATA[Catamenial pneumothorax (CP) is a recurrent spontaneous pneumothorax during the menstruation period and is often associated with thoracic-pelvic endometriosis. This case study reported a 39-year-old woman who presented with recurrent shortness of breath, particularly during menstruation. The patient also experienced severe dysmenorrhea and difficulty getting pregnant. Despite a negative sputum test, a history of chest tube insertion and tuberculosis treatment were identified. Elevated levels of the CA-125 marker were observed in a previous examination. Physical examination revealed decreased fremitus sounds on the mediobasal side, chest expansion, and right lung breath sounds. The plain radiograph displayed a visceral pleural line, air-fluid level appearance, and the collapse of the right hemithorax accompanied by fibrosis. The patient underwent inpatient treatment and had a chest tube inserted. A decortication thoracotomy procedure was performed, and anatomical pathology microscopic examination of the right lung tissue revealed a non-specific chronic inflammatory process accompanied by fibrosis.]]>
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