Primary hepatic fibrosarcoma in a Wistar rat (Rattus norvegicus)

First report of spontaneous hepatic fibrosarcoma in a white‐tufted marmoset (Callithrix jacchus) kept in captivity

“…The diagnosis was obtained post mortem because the neoplasm was poorly differentiated 10 . The diagnostic technique of histopathology was insufficient for cell distinction, which therefore made immunohistochemistry necessary 11 …”

“…10 The diagnostic technique of histopathology was insufficient for cell distinction, which therefore made immunohistochemistry necessary. 11 Mesenchymal neoplasms are usually fusiform. 12 This type of cellular arrangement, with atypia and mitosis figures were present in the case reported here.…”