title: [A case of spontaneous pneumothorax due to metastasis of urinary bladder carcinoma to the lung].
abstract: We reported a case of spontaneous pneumothorax associated with pulmonary metastasis of urinary bladder carcinoma. A 73-year-old male patient complaining of chest pain and dyspnea was admitted, who had undergone transurethral resection of the urinary bladder carcinoma and diagnosis of inactive pulmonary tuberculosis based on the chest X-ray film finding one year previously. On admission, chest X-ray film showed right pneumothorax, and the re-expanded chest X-ray film revealed a cystic lesion in the right upper lung field adjacent to the anterior chest wall, corresponding to the previous pulmonary lesion. Three months later, right thoracotomy was performed because of relapse accompanying by profuse air-leakage. There was a pleural fistula on the surface of the cystic lesion and necrotic tissue in it. Drainage bronchi were involved by surrounding tumorous tissue. Histological examination of the specimen from the cyst wall disclosed metastasis of transitional cell carcinoma of the bladder. The probable mechanism of the spontaneous pneumothorax probable consisted of stenosis of the right B3 bronchus caused by the metastatic tumor produced a check valve mechanism leading to cystic lesion, the rupture of which caused the spontaneous pneumothorax.
authors.forename: Y
authors.initials: Y
authors.lastname: Hamamoto
authors.forename: S
authors.initials: S
authors.lastname: Kawarazaki
authors.forename: T
authors.initials: T
authors.lastname: Taniguchi
authors.forename: K
authors.initials: K
authors.lastname: Hashimoto
authors.forename: H
authors.initials: H
authors.lastname: Okada
authors.forename: M
authors.initials: M
authors.lastname: Nakashima
authors.forename: K
authors.initials: K
authors.lastname: Takasu
authors.forename: Y C
authors.initials: YC
authors.lastname: Kim
mesh_terms: D000368:Aged; D002295:Carcinoma, Transitional Cell / Q000150:complications / Q000000981:diagnostic imaging / Q000556:secondary*; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000556:secondary*; D008297:Male; D011030:Pneumothorax / Q000000981:diagnostic imaging / Q000209:etiology*; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms