title: Clinical characteristics of catamenial and non-catamenial thoracic endometriosis-related pneumothorax.
abstract: OBJECTIVE
  A major pathogenic factor for catamenial pneumothorax is thoracic endometriosis. However, thoracic endometriosis-related pneumothorax (TERP) can develop as either catamenial or non-catamenial pneumothorax (CP). Therefore, the aim of this study was to elucidate the clinical differences between catamenial and non-catamenial TERP.
  
  
  METHODS
  The clinical and pathological data in female patients who underwent video-assisted thoracoscopic surgery at the Pneumothorax Research Center during an 8-year period were retrospectively reviewed. This study included 150 female patients with surgico-pathologically confirmed TERP. The subjects were divided into two groups, those having all of the pneumothorax episodes in the catamenial period (CP group) and those who did not (non-CP group). We compared the clinical characteristics and surgico-pathological findings between these two groups.
  
  
  RESULTS
  Of the 150 TERP patients, 55 (36.7%) were classified in the CP group, and 95 (63.3%) in the non-CP group. In regard to the locations of endometriosis, all TERP patients had diaphragmatic endometriosis, while pleural implantation was recognized in 34 of the 55 (61.8%) patients in the CP group and 42 of the 95 (44.2%) patients in the non-CP group (P < 0.05).
  
  
  CONCLUSIONS
  A significant difference in the proportion of patients with pleural endometriosis was observed between catamenial and non-catamenial TERP. The ectopic sites of the endometriosis may be responsible for the timing of the pneumothorax episodes.
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.|Department of Respirology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan.
authors: Mizuki
authors: M
authors: Fukuoka
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.
authors: Masatoshi
authors: M
authors: Kurihara
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.|Department of Respirology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan.
authors: Takahiro
authors: T
authors: Haga
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.
authors: Hiroki
authors: H
authors: Ebana
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.
authors: Hideyuki
authors: H
authors: Kataoka
authors: Pneumothorax Research Center and Division of Thoracic Surgery, Nissan Tamagawa Hospital, Tokyo, Japan.
authors: Teruaki
authors: T
authors: Mizobuchi
authors: Department of Respirology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan.
authors: Koichiro
authors: K
authors: Tatsumi
mesh_terms: D000328:Adult; D003964:Diaphragm; D004715:Endometriosis / Q000150:complications* / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008598:Menstruation; D008875:Middle Aged; D009135:Muscular Diseases / Q000150:complications* / Q000473:pathology / Q000601:surgery; D010995:Pleural Diseases / Q000150:complications* / Q000473:pathology / Q000601:surgery; D011030:Pneumothorax / Q000209:etiology*; D012189:Retrospective Studies; D020775:Thoracic Surgery, Video-Assisted; D055815:Young Adult
keywords: catamenial pneumothorax; endometriosis; pneumothorax; spontaneous pneumothorax; video assisted thoracoscopic surgery