Hormonal manipulation after surgery for catamenial pneumothorax.

A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was whether hormonal manipulation with gonadotrophin-releasing hormone analogues reduces the risk of recurrent catamenial pneumothorax after surgery, compared with surgery alone. Altogether 819 papers were found using the reported search, of which 7 represented the best evidence to answer the clinical question. The authors, date, journal, country of publication, study type, level of evidence, patient group studied, relevant outcomes and results of these papers are tabulated. Of the 7 papers selected, 6 demonstrated a reduction in recurrence of catamenial pneumothorax with the use of gonadotrophin-releasing hormone analogues, whereas in the single paper where surgery alone was performed, no evidence of recurrence was demonstrated. We therefore conclude that, based on very small retrospective observational studies, gonadotrophin-releasing hormone analogues used as an adjunct to surgical intervention may reduce the risk of recurrent pneumothorax, when compared with either no hormonal therapy or oestrogen-progesterone therapy, but should be initiated and supervised by gynaecologists who will be familiar with the therapy and the potential side effects.