An additional procedure involves a mesh that is placed over the diaphragm to block any holes that may have been missed in the first surgery. Hormonal therapies can also be used to suppress ovulation. Surgical removal of the endometrial tissue should be endeavored during menstruation for optimal visualization. Pleurodesis may also be effective in removing the space between the lung and the chest wall; preventing air build up between these layers. Non-surgical treatment includes pharmacological treatment via continuous oral contraceptive therapy to avoid cyclical bleeding with monthly menstruation. Oral contraceptives appear to be preferable for patients due to fewer negative side effects than treatment with GnRH agonist therapy, which can lead to hypoestrogenic effects including osteoporosis, resulting in discontinuation of therapy and thus a higher likelihood of recurrence of catamenial pneumothorax. Epidemiology
Some sources claim this entity represents 3 to 6% of pneumothorax in women. In regard of the low incidence of primary spontaneous pneumothorax (i.e. not due to surgical trauma etc.) in women (about 1/100000/year), this is a very rare condition. Hence, many basic textbooks do not mention it, and many doctors have never heard of it. Therefore, catamenial pneumothorax is probably under-recognized. See also
Catamenial epilepsy
Catamenial migraine

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In Blum & Ritters study in West Germany (1990), they found that 27% of their population had only minor issues, 72% had a palpable mass at the site, and 23% reported pain and other signs of inflammation such as hyperthermia, pulsation, and cystic, pustular, or papular lesions. Size of masses were an average of 2 cm in diameter ranging up to 4 cm, some being associated with purulent drainage, continuous discharge, and crusting. Dystrophic calcinosis cutis has also been reported. Other serious sequelae include sialolithiasis of the submandibular gland and adenolymphoma of the parotid gland.The histopathology of fiddlers neck frequently shows hyperkeratosis and acanthosis, along with plugging of follicles. Histiocytic infiltration with granulomas to foreign body and follicular cysts are also common. Foreign body granulomas are thought to derive from abrasion of the wooden surface of the chin rest and its absorption into the superficial dermis. The location and complex mechanism of causation for fiddlers neck give rise to a wider spectrum of skin changes when compared to contact dermatitis from more common irritants. Fiddlers neck can be differentiated from rosacea and sarcoid reaction with granulomas. Causes
The proximal causes of fiddlers neck are friction and pressure, but both repetitive shearing stress and occlusion with consequent trapping of sweat give rise to progressive damage. This damage along with poor hygiene predisposes the area to local infection, and such infection can progress to scarring and other long-term effects.