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ABSTRACT: In this retrospective and prospective study, histopathological immunohistochemical analyses of 62 cases lymphomas in cats were performed to classify the anatomic forms subtypes, according WHO guidelines, correlate it FeLV proviral DNA detected using PCR. The most common anatomical form was gastrointestinal (40.3%, 25/62), followed by multicentric (29%, 18/62), mediastinal (17.7%, 11/6...