v.13, n.3, 10
Case Report
Mammary carcinoma in a mixed tumor with myeloid metaplasia component presenting Leishmania spp. in a dog
Alexandre Arenales, Jefferson Ferreira, Ana Carolina O. Almeida, Daniella B. Rozza, Maria Cecília R. Luvizotto
Abstract
Here is described a 9-years-old, intact female dog with cytopathological analysis from mammary tumors containing Leishmania spp. amastigotes in macrophages. The animal was submitted to euthanasia and necropsy was performed. Histopathological diagnosis was a mammary carcinoma in a mixed tumor, grade I, with myeloid metaplasia component containing macrophages laden with a large amount of amastigotes. For confirmation, immunohistochemistry was used in neoplastic tissue and resulted in strong positivity for Leishmania antibody. Myeloid metaplasia portion of mammary carcinoma in a mixed tumor may be, rarely, a site for diagnosis of Canine Visceral Leishmaniasis.
Key words: canine visceral leishmaniasis, cytopathology, immunohistochemistry, mammary gland tumor.