Abstract
ABSTRACT. Bruno S.F., Longa C. da S., Campos S.D.E., Monteiro F. de O., Dória P.B. de A. & Costa C.H.C. [Mammary fibrosarcoma in female Wistar rat (Rattus norvegicus Berkenhout 1769) - Case report]. Fibrossarcoma mamário em fêmea de ratazana Wistar (Rattus norvegicus Berkenhout 1769) - Relato de caso. Revista Brasileira de Medicina Veterinária, 33(3):171-176, 2011. Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense, Rua Vital Brazil Filho, 64, Niterói, RJ 24230-360, Brasil. E-mail: saviobruno@vm.uff.br This paper reports the development of malignant tumor, fibrosarcoma, sustaining the connective tissue of the mammary gland in female Wistar rats (Rattus norvegicus Berkenhout, 1769) with 21 months of age. The animal had a non-ulcerated nodule of firm consistency in the abdominal region. After physical examination and radiographic evaluation was chosen by the surgical removal of this nodule. Inhalation anesthesia was performed for regional mastectomy and was established antibiotic and anti-inflammatory medication postoperatively. The tumor removed was stored in 10% formalin solution for histopathology which revealed fibrosarcoma with low malignancy. The animal has recovered satisfactorily from surgery. Recurrence occurred after six months of surgery with growth of three nodules. However, in a second attempt to remove the nodules, the animal died.