20/06/2019
If pneumothorax develops at the time of menstruation, it is called catamenial pneumothorax. It is usually on the right side, occurs within 48 h of onset of menstruation, common in 25 to 30 year old female and is due to intrapleural endometriosis.
Most catamenial pneumothoraces are small and self resolving. In some cases, it is treated by hormone therapy to suppress ovulation (by progesterone or androgen therapy) or simply by oral contraceptive pills. Sometimes, surgical exploration and pleurodesis may be needed.