Intrathoracic endometriosis resulting in catamenial pneumothorax.

A woman in her early 40s presented with right-side chest pain radiating to the ipsilateral shoulder coinciding with her menstrual periods. She complained of worsening dysmenorrhoea over the preceding 6months. Chest radiograph was notable for pneumothorax. Conservative management through hormonal suppression was initially pursued but proved ineffective for preventing recurrence. The patient ultimately underwent videoassisted diagnostic thoracoscopic surgery through robotic approach; intraoperative findings confirmed the presence of endometrial deposits of the diaphragm, confirming the cause of the patient’s catamenial pneumothorax. The patient recovered well and was started on a gonadotropin-releasing hormone antagonist 3weeks following her operation. [ABSTRACT FROM AUTHOR]