title: [Lung Cancer Incidentally Detected by a Subcutaneous Nodule at the Drainage Site for Pneumothorax].
abstract: A 43-year-old male patient underwent thoracic drainage for the treatment of right pneumothorax. After 6 months, the patient visited our department because of a subcutaneous nodule found at the drainage site. Chest computed tomography revealed a mass lesion associated with a cavity in the right upper lobe of the lung and a subcutaneous nodule. Surgical resection was performed and both the pulmonary lesion and subcutaneous nodule were found to be adenocarcinoma. Although immunohistochemical analysis suggested that the pulmonary lesion was primary lung cancer, there were neither intrathoracic exposure of the tumor nor tumor cells in the pleural lavage cytology. The expression pattern of subcutaneous tumor in the right chest was slightly different from that of the lung lesion by immunohistochemistry. Therefore, it was difficult to determine whether this subcutaneous nodule was a tumor implantation through the drainage procedure or subcutaneous metastasis from the primary tumor.
authors.affiliation: Department of General, Thoracic and Cardiovascular Surgery, Kanazawa University, Kanazawa, Japan.
authors.forename: Jumpei
authors.initials: J
authors.lastname: Okamoto
authors.forename: Isao
authors.initials: I
authors.lastname: Matsumoto
authors.forename: Daisuke
authors.initials: D
authors.lastname: Saito
authors.forename: Shuhei
authors.initials: S
authors.lastname: Yoshida
authors.forename: Munehisa
authors.initials: M
authors.lastname: Takada
authors.forename: Masaya
authors.initials: M
authors.lastname: Tamura
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Takemura
authors.forename: Hiroko
authors.initials: H
authors.lastname: Ikeda
mesh_terms: D000328:Adult; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D004322:Drainage; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000601:surgery*; D008297:Male; D064847:Multimodal Imaging; D011030:Pneumothorax / Q000209:etiology* / Q000628:therapy; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed