title: [Clinical analysis of primary lung cancer with a thin-walled cavity to explain the mechanism of thin-walled cavity formation].
abstract: We report 8 rare cases of primary lung cancer which showed a thin-walled cavity on chest X-ray and CT. We analyzed 8 cases (7 men, 1 woman) of primary lung cancer with thin-walled cavities admitted to our hospital between 1995 and 2006. The subjects were aged between 45 and 84 years of age (median: 72 years old). The reason for detection was treatment for tuberculosis in 1 case, ileus owing to metastasis to the small intestine in 1 case and tension pnumathorax 1 case, while 5 cases had abnormal chest x-ray film shadows without symptoms. Histologically, there were 5 cases of adenocarcinoma, 2 of squamous cell carcinoma, and 1 of adenosquamous cell carcinoma. Though various reports on the mechanism of the development of thin-walled cavity formation have been made, we suggest that it mainly develops by a check-valve mechanism, based on evaluation of the clinical course.
authors.affiliation: Division of Respiratory Disease, Kumamoto Regional Medical Center.
authors.forename: Yukihiro
authors.initials: Y
authors.lastname: Sugimoto
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Semba
authors.forename: Shinji
authors.initials: S
authors.lastname: Fujii
authors.forename: Eri
authors.initials: E
authors.lastname: Furukawa
authors.forename: Ryouichi
authors.initials: R
authors.lastname: Kurano
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology*; D000368:Aged; D000369:Aged, 80 and over; D018196:Carcinoma, Adenosquamous / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed