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Recurring catamenial pneumothorax treated with a Gn-RH analogue.

We report a case of recurring catamenial pneumothorax with concurrent pelvic endometriosis. Thoracoscopy revealed a blue-like lesion on top of the dome of the right hemidiaphragm. Microscopic examination of biopsy specimens showed endometriosis. The patient was treated with a Gn-RH analogue and remains well without further evidence of pneumothorax after six months.