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ABSTRACT. Peixoto P.V., Teixeira R.S., Mascarenhas M.B., França T.N., Azevedo S.C.S., Reinacher M., Costa T.S. & Ramadinha R.R. [Atypical forms and clinic-epidemiological aspects of canine transmissible venereal tumor in Brazil.] Formas atípicas e aspectos clínico-epidemiológicos do tumor venéreo transmissível canino no Brasil. Revista Brasileira de Medicina Veterinária 38(Supl.2):101-107, 2016. Departamento Nutrição Animal e Pastagem, Instituto de Zootecnia, Universidade Federal Rural do Rio de Janeiro, BR-465 Km 7, Seropédica, RJ 23851-970, Brasil. E-mail: email@example.com From 203 dogs of both sexes, affected by the Transmissible Venereal Tumor (TVT) from May, 1995 to December, 2004, the genital form of TVT was observed in 117 (57.64%) of the dogs, and in 39 of those 203 animals (19.21%) showed genital and extra genital tumours. The exclusively extra genital form of TVT was considered very common in 47 (23.15%) animals. Extra genital forms were seen in the oral mucosa (18 cases), nasal cavity (13 cases) and anal (6 cases). This paper highlights seven cases of the eyeball, two in corneas, two on eyelids, one in third eyelid and one on bilateral conjunctiva and one in an anterior and posterior eye chamber. Some cases was considered very atypical, including those animals with tumors in the conjunctiva - bilaterally and symmetrically -, in an anterior and posterior eye chamber, involving the footpad of the front leg, and in the external ear canal. In addition, clinic-epidemiological aspects and the possible way of transmission of TVT will be discussed in this paper.