title: Pulmonary intestinal-type adenocarcinoma.
abstract: We report a rare case of pulmonary intestinal-type adenocarcinoma in a 69-year-old man. A computed tomographic scan of the chest and positron emission tomography revealed a well-defined nodule measuring 2.5 cmx2.5 cm in the right lower lobe with high (18)F-fluorodeoxyglucose accumulation. Furthermore, sputum cytology tested positive for adenocarcinoma. Right lower lobectomy and systemic lymph node dissection were performed by video-assisted thoracic surgery (VATS). Histopathologically, the tumor was composed mainly of tall columnar cells with similarity to intestinal epithelia and colorectal carcinoma. Immunohistochemical staining was positive for cytokeratin 7 (CK7) and thyroid transcription factor-1 (TTF-1), whereas staining for cytokeratin 20 (CK20) was negative. The final diagnosis was primary pulmonary intestinal-type adenocarcinoma.
authors.affiliation: Division of Thoracic Surgery, Matsue Red Cross Hospital, 200 Horomachi, Matsue, Shimane 690-8506, Japan. ryomaedamatsue@yahoo.co.jp
authors.forename: Ryo
authors.initials: R
authors.lastname: Maeda
authors.forename: Noritaka
authors.initials: N
authors.lastname: Isowa
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Onuma
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Miura
mesh_terms: D000230:Adenocarcinoma / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D000368:Aged; D019788:Fluorodeoxyglucose F18; D006801:Humans; D053554:Keratin-20 / Q000032:analysis; D053552:Keratin-7 / Q000032:analysis; D008175:Lung Neoplasms / Q000737:chemistry / Q000473:pathology* / Q000601:surgery; D008197:Lymph Node Excision; D008297:Male; D009687:Nuclear Proteins / Q000032:analysis; D011013:Pneumonectomy; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D013183:Sputum / Q000166:cytology; D020775:Thoracic Surgery, Video-Assisted; D000074482:Thyroid Nuclear Factor 1; D014057:Tomography, X-Ray Computed; D014157:Transcription Factors / Q000032:analysis
chemical_list: C507499:KRT20 protein, human; C507497:KRT7 protein, human; D053554:Keratin-20; D053552:Keratin-7; C000614412:NKX2-1 protein, human; D009687:Nuclear Proteins; D019275:Radiopharmaceuticals; D000074482:Thyroid Nuclear Factor 1; D014157:Transcription Factors; D019788:Fluorodeoxyglucose F18