Catamenial pneumothorax

Catamenial pneumothorax

Catamenial pneumothorax is a condition of collapsed lung occurring in conjunction with menstrual periods (catamenial refers to menstruation), believed to be caused primarily by endometriosis of the pleura (the membrane surrounding the lung). [http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_p_25zPzhtm#12652312 Definition from mercksource.com (Dorlands Medical Dictionary)] ]

Classification

Catamenial Pneumothorax is the most common form of thoracic endometriosis syndrome, which also includes catamenial hemothorax, catamenial hemoptysis, catamenial hemopneumothorax and endometriosis lung nodules, as well as some exceptional presentations.

ymptoms and signs

Onset of lung collapse is less than 72 hours after menstruation. Typically, it occurs in women aged 30-40 years, but has been diagnosed in young girls as early as 10 years of age and post menopausal women (exclusively in women of menstrual age) most with a history of pelvic endometriosis.

Pathophysiology

Endometriosis can attach to the lung, forming chocolate-like cysts. Generally the parietal pleura is involved, but the lung itself, the visceral layer, the diaphragm, and more rarely the tracheobronchial tree may also be afflictedJoseph J, Sahn SA. Thoracic endometriosis syndrome: new observations from an analysis of 110 cases. "Am J Med" 1996; 100: 164-70. PMID 8629650] . How this endometrial tissue reaches the thorax remains enigmatic, although defects in the diaphragm can often be found.Alifano M, Roth T, Broet SC, Schussler O, Magdeleinat P, Regnard JF. Catamenial pneumothorax: a prospective study. "Chest" 2003; 124: 1004-8. PMID 12970030]

The cysts can release blood; the endometrial cyst "menstruates" in the lung. Air can move in by an unknown mechanism. The blood and air cause the lung to collapse ("i.e." catamenial hemopneumothorax).Glynis D. Wallace. "Living With Lung And Colon Endometriosis: Catamenial Pneumothorax". Authorhouse, 2005. ISBN 1-4208-8331-3]

Diagnosis

Diagnosis can be hinted by high recurrence rates of lung collapse in a woman of reproductive age with endometriosis. CA-125 is elevated. Nowadays, video-assisted thoracoscopy is used for confirmation.

Treatment

Pneumothorax is a medical emergency because it comes with severe pain and decreased lung function. A chest tube should be inserted after clinical assessment. This releases the air and menstrual blood, and the lung can re-expand.

Surgery, hormonal treatments and combined approaches have all been proposed, with variable results in terms of short and long term outcome.cite journal |author=Peikert T, Gillespie DJ, Cassivi SD |title=Catamenial pneumothorax: case report and review of the literature |journal=Mayo Clinic Proceedings |volume=80 |issue=5 |pages=677–680 |year=2005 |pmid=15887438] Surgical removal of the endometrial tissue should be endeavoured during menstruation for optimal visualisation of the cyst.Poyraz AS, Kilic D, Hatipoglu A, Demirhan BA. A very rare entity: catamenial pneumothorax. "Asian Cardiovasc Thorac Ann" 2005; 13:271-3. PMID 16113003] Pleurodesis may also be helpful. Menstruation and accompanying lung collapse can be suppressed with hormone therapy,eMedicine|radio|563] like with Lupron Depot, danazol or extended cycle combined oral contraceptive pills.

Epidemiology

Some sources claim this entity represents 3-6% of pneumothorax in women.eMedicine|radio|563] In regard of the low incidence of (primary spontaneous, "i.e." not due to surgical trauma "etc.") pneumothorax in women (about 1/100'000/year),eMedicine|radio|563] this is a very rare condition. Hence, many basic textbooks don't mention it, and many doctors have never heard of it.Glynis D. Wallace. "Living With Lung And Colon Endometriosis: Catamenial Pneumothorax". Authorhouse, 2005. ISBN 1-4208-8331-3] However, catamenial pneumothorax is probably under-recognised.Alifano M, Roth T, Broet SC, Schussler O, Magdeleinat P, Regnard JF. Catamenial pneumothorax: a prospective study. "Chest" 2003; 124: 1004-8. PMID 12970030]

References

Review article: Alifano M, Trisolini R, Cancellieri A, Regnard JF. Thoracic endometriosis: current knowledge. "Ann Thorac Surg" 2006; 81: 761-9. PMID 16427904


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