<unk>  is a condition of collapsed lung occurring in conjunction with menstrual periods<unk>  refers to menstruation), believed to be caused primarily by  endometriosis of the pleura (the membrane surrounding the lung).
Catamenial pneumothorax
Mediastinal hematoma
Tracheal fracture
Pulmonary hematoma
Tracheal deviation
Hemothorax
Chylothorax
Hydropneumothorax