title: Radiographic characterization of primary lung tumors in 74 dogs.
abstract: Primary pulmonary neoplasia is well recognized in dogs and prognosis depends upon the tumor type. The purpose of this retrospective study was to characterize the radiographic appearance of different primary lung tumors with the goal of establishing imaging criteria to separate the different types. Three-view thoracic radiographs of 74 dogs with histologically confirmed pulmonary anaplastic carcinoma (n = 2), adenocarcinoma (n = 31), bronchioalveolar carcinoma (n = 19), histiocytic sarcoma (n = 21), and squamous cell carcinoma (n = 1) were evaluated. Radiographs were assessed for tumor volume, affected lobe, location within lobe, overall pulmonary pattern, presence of cavitation, mineralization, air bronchograms, lymphadenomegaly, and pleural fluid. Histiocytic sarcomas were significantly larger than other tumor types (271 cm(3); P = 0.009) and most likely to be found in the left cranial (38%; 8/21) and right middle (43%; 9/21) lung lobes, whereas adenocarcinomas were most likely to be found in the left caudal (29%; 9/31) lung lobe. Fifty-seven percent (12/21) of histiocytic sarcomas had an internal air bronchogram. Findings indicate that a large mass in the periphery or affecting the whole lobe of the right middle or left cranial lung lobe with an internal air bronchogram is likely to be an histiocytic sarcoma.
authors.affiliation: University of California, Davis, School of Veterinary Medicine, Veterinary Medical Teaching Hospital, Davis, CA, 95616.
authors.forename: Laura E
authors.initials: LE
authors.lastname: Barrett
authors.forename: Rachel E
authors.initials: RE
authors.lastname: Pollard
authors.forename: Allison
authors.initials: A
authors.lastname: Zwingenberger
authors.forename: Alexandra
authors.initials: A
authors.lastname: Zierenberg-Ripoll
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Skorupski
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D002282:Adenocarcinoma, Bronchiolo-Alveolar / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D000818:Animals; D002140:California; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D004285:Dogs; D005260:Female; D054747:Histiocytic Sarcoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D008297:Male; D011859:Radiography; D012189:Retrospective Studies
keywords: dog; histiocytic sarcoma; primary lung tumor; radiography