Pathological Characterization of Lymphoma with Pulmonary Involvement in Cats.
J Comp Pathol 2018;
165:6-12. [PMID:
30502798 DOI:
10.1016/j.jcpa.2018.09.007]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/21/2018] [Accepted: 09/12/2018] [Indexed: 01/15/2023]
Abstract
Studies evaluating histological patterns of lung infiltration by lymphoma in cats are lacking. We evaluated retrospectively the histological patterns of 125 necropsy cases of feline lymphoma collected over a 12-year period. Of the 125 cases, 16 showed lung infiltration (12.8%). Nine cats were female, seven cats were male and all were of mixed breed. Gross lesions observed in the lungs consisted of masses (25%) and nodules (18.7%); however, the majority of cases (56.2%) did not show any gross abnormality. Peribronchial-vascular infiltration (93.7%) was the most frequent pattern, followed by pleural (56.2%), interstitial (50%), nodular (37.5%) and alveolar (12.5%) patterns, but 75% of the cases had more than one pulmonary infiltration pattern. There were 14 (87.5%) B-cell and two (12.5%) T-cell lymphomas. Six cats (37.5%) were positive for feline leukaemia virus and three cats (18.7%) were positive for feline immunodeficiency virus. Diffuse large B-cell lymphoma was the most frequent type, accounting for 56% of all cases.
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