Canine low-grade intra-orbital myxosarcoma: case report
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Published on: October 24, 2016
Cecília B Campos1, Fernanda C Nunes, Conrado O Gamba
1Laboratory of Comparative Pathology, Department of General Pathology, Biological Science Institute, Federal University of Minas Gerais (UFMG), Belo Horizonte, MG, 31270-901, Brazil.
Objective:
The aim of this study was to evaluate important clinical, morphological, histopathological, histochemical, and immunohistochemical characteristics in order to establish the diagnosis and prognosis of a low-grade intra-orbital myxosarcoma.
Animal Studied:
A mongrel dog presented a 2-year history of a neoplastic mass behind the right eye.
Results:
The neoplasm presented a mesenchymal spindle and stellate cell proliferation with an abundant myxoid matrix, moderate anisocariosis, and a low mitotic index. It stained positive for vimentin, moderately positive for periodic acid-Schiff, and negative for Gomori trichrome stain and α-smooth muscle actin.
Conclusions:
One year following surgical excision, the patient remains disease free. The histological findings established a diagnosis of a rare canine intra-orbital low-grade myxosarcoma.
