Canine transmissible venereal tumor with spontaneous remission: case study with emphasis on clinical and cytopathological exams to monitor tumor evolution

Abstract The canine transmissible venereal tumor (TVTC) is a neoplasm transmitted mainly through copulation and with high incidence in stray dogs Brazil. In the process of evolution TVTC, progression, stationary regression phases are recognized. host immunity related to disease’s biological behavior, however, spontaneous observation cases naturally occurring TVTC uncommon. A patient was attended, after beeing rescued from street, due an ulcerated mass external genitália tick infestation. Cytopathological examination, which diagnosed laboratory tests that showed mild anemia severe thrombocytopenia were performed. view impossibility carrying out other exams, it made presumptive diagnosis monocytic ehrlichiosis (CME), treatment instituted. During follow-up observed quick improvement clinical signs changes, as well reduction mass. new cytopathological evaluation carried out, verified increase mature lymphocytes plasmocytes midst cells, finding compatible phase disease. From moment on, decided perform only follow-up. following evaluations, continuous remission findings those described observed, until its complete remission. It considered general health CME simultaneous performance serial exams may be feasible useful for monitoring stages TVTC.