Adenocarcinoma pulmonar associado à infecção por Mycobacterium sp. em vaca - relato de caso

Medeiros, N. G. AFrade, M. T. SSouto, E. P. FMelo, M. AAguiar, G. M. NAzevedo, S. SHeinemann, M. BDantas, A. F. M

).(AU)^ipt{{The clinical, anatomopathological, immunohistochemical, microbiological and molecular aspects of a case of pulmonary adenocarcinoma associated with infection by Mycobacterium sp. in a cow are described. The animal presented hyporexia, weight loss, vocalizations, orthopneic posture, jugular engorgement, positive venous stasis, expiratory groaning and death. At necropsy, the lungs were enlarged and presented firm, multifocal to coalescent yellowish nodules, interposed by reddish areas on the pleural surface. At cut, the nodules deepened to the parenchyma and had multiple foci of caseous and friable appearance and areas of mineralization. The pericardial sac and tracheobronchial, iliac, aortic lumbar and mammary lymph nodes showed similar lesions. Histologically, a carcinomatous neoformation, associated with multifocal areas of necrosis and mineralization, was observed. Neoplastic cells were strongly immunolabelled by anti-PanCytokeratin antibody AE1/AE3. Microbiological culture of lung fragments showed growth of bacterial colonies compatible with atypical mycobacteria. Molecular sequencing submitted to BLASTn identified the Mycobacterium sp. WCM 7299 (ID: gb