COMPUTED TOMOGRAPHIC FINDINGS IN 57 CATS WITH PRIMARY PULMONARY NEOPLASIA |
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| Authors: | Stacie Aarsvold Jennifer A. Reetz Jean K. Reichle Ian D. Jones Christopher R. Lamb Maria G. Evola Michele A. Keyerleber Angela J. Marolf |
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| Affiliation: | 1. ASEC, Radiology, Los Angeles, CA;2. Department of Radiology, Ryan Veterinary Hospital, University of Pennsylvania, Philadelphia, PA;3. Radiology, Animal Specialty & Emergency Center, Los Angeles, CA;4. Veterinary Clinical Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Herts, UK;5. Diagnostic Imaging, Animal Specialty and Emergency Center, Los Angeles, CA;6. Cummings School of Veterinary Medicine, Tufts University, Radiation Oncology, North Grafton, MA;7. Radiology, Veterinary Medical Center, Colorado State University, Fort Collins, CO |
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| Abstract: | Primary pulmonary neoplasia is relatively uncommon in cats and generally has a poor prognosis. In this multicenter, retrospective study of 57 cats with pulmonary neoplasia, the most frequent presenting signs were anorexia/inappetence (39%) and cough (37%). The pulmonary tumors were considered to be incidental findings in 9% cats. In computed tomographic (CT) images, primary pulmonary tumors appeared as a pulmonary mass in 55 (96%) cats and as a disseminated pulmonary lesion without a defined mass in two (4%) cats. Most pulmonary tumors were in the caudal lobes, with 28 (49%) in the right caudal lobe and 17 (30%) in the left caudal lobe. CT features associated with pulmonary tumors included mass in contact with visceral pleura (96%), irregular margins (83%), well‐defined borders (79%), bronchial compression (74%), gas‐containing cavities (63%), foci of mineral attenuation (56%), and bronchial invasion (19%). The mean (range) maximal dimension of the pulmonary masses was 3.5 cm (1.1–11.5 cm). Additional foci of pulmonary disease compatible with metastasis were observed in 53% cats. Pleural fluid was evident in 30% cats and pulmonary thrombosis in 12% cats. The histologic diagnoses were 47 (82%) adenocarcinomas, six (11%) tumors of bronchial origin, three (5%) adenosquamous cell carcinomas, and one (2%) squamous cell carcinoma. In this series, adenocarcinoma was the predominant tumor type, but shared many features with less common tumor types. No associations were identified between tumor type and CT features. Prevalence of suspected intrapulmonary metastasis was higher than in previous radiographic studies of cats with lung tumors. |
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| Keywords: | cat computed tomography lung neoplasia pulmonary |
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