Álvarez P, Wessmann A, Pascual M, Comas O, Pi D, Pumarola M. Cerebral gliosarcoma with perivascular involvement in a cat.
JFMS Open Rep 2019;
5:2055116919879783. [PMID:
31636916 PMCID:
PMC6787989 DOI:
10.1177/2055116919879783]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Case summary
A 5-year-old neutered male domestic shorthair cat presented with an 18-month
history of facial tics, and progressive general ataxia, weakness, lethargy
and anorexia of 2 weeks’ duration. MRI of the brain showed a well-defined
heterogeneous hyperintense mass on T1-weighted and T2-weighted images, with
central hypointensity in the rostral commissure and septum pellucidum, and
perilesional hyperintensity in fluid-attenuated inversion recovery,
suggestive of perilesional oedema. Gross examination in a transverse section
of the brain at the level of the septum pellucidum revealed a 0.2 cm brown
soft mass. Histopathological examination identified a biphasic neoplastic
proliferation of mesenchymal and neuroepithelial cell populations. Fusiform
cells were predominately distributed in bundles showing a high degree of
anisocytosis and marked immune-positive reaction to vimentin
immunochemistry, confirming a sarcomatous origin. Additionally, high numbers
of astrocytic cells were identified by an intense immunopositive reaction to
glial fibrillary acidic protein and negative reaction to oligodendrocyte
transcription factor 2 immunochemistry. Vascular invasion of the neoplasia
into the wall of a medium branch of the rostral cerebral artery was present
(secondary Scherer structures). Based on these characteristics, the tumour
was defined as a gliosarcoma. Gliosarcoma is a recognised astrocytoma grade
IV anaplastic glial cell tumour with sarcomatous differentiation.
Relevance and novel information
To our knowledge, this is the first report describing a cerebral gliosarcoma
in a cat including clinical, MRI, macroscopic and histopathological features
and immunolabelling characteristics.
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