Periódicos Brasileiros em Medicina Veterinária e Zootecnia

p. 1145-1150

Cutaneous myxosarcoma in a Syrian hamster (Mesocricetus auratus)

Cagnini, Didier QuevedoHeckler, Marta Cristina ThomasMoya-Araujo, Carla FredrichsenAraújo, Gustavo Henrique MarquesAmorim, Renée Laufer

The pathological findings in a 2-years-old Syrian hamster (Mesocricetus auratus) with a cutaneous myxosarcoma are described. Grossly, there was a large cutaneous mass in the right cervical region. Microscopical evaluation revealed a myxosarcoma characterized by pleomorphic, fusiform cells loosely arranged, randomly distributed, and presenting a moderate amount of basophilic amorphous stroma. There were hemorrhagic areas within the tumor. The basophilic amorphous stroma was positive to Alcian blue confirming the presence of a mucopolysaccharide matrix. Immunohistochemically, the neoplastic cells expressed vimentin, and were negative for cytokeratin or glial fibrillary acidic protein (GFAP).

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