Vet Med - Czech, 2021, 66(9):406-412 | DOI: 10.17221/191/2020-VETMED

Intracranial meningioma in a pet rat: MRI findingsCase Report

C Cococcetta ORCID...1, F Del Signore1, I Cerasoli1, G Di Guardo1, M Baffoni1, G Di Francesco2, V Crocchianti1, M Vignoli1
1 Veterinary Teaching Hospital, University of Teramo, Teramo, Italy
2 Istituto Zooprofilattico Sperimentale dell'Abruzzo e Molise "G. Caporale", Teramo, Italy

We herein report the magnetic resonance imaging (MRI) findings in a brain meningioma in a pet rat (Rattus norvegicus domestica). A 1.5-year-old pet rat was referred for depression, ataxia, tremors and bilateral nystagmus; a brain MRI was elected suspecting an intracranial neoplasia. The study was performed with a 0.25 T scanner. The MRI revealed a well-defined oval mass with a heterogeneous appearance, hyperintense in T1 and T2, and with extra-axial localisation and severe brain compression, the mass appeared strongly and diffusely contrast-enhancing. Euthanasia was elected, with the necropsy confirming the presence of a voluminous extra-axial mass. Histologically, a well-differentiated, benign meningotheliomatous meningioma was diagnosed, with the histochemical stains allowing one to exclude a granular cell tumour. To the best of our knowledge, this is the first report of MRI investigations on a pet rat intracranial meningioma.

Keywords: benign meningotheliomatous meningioma; brain tumour; magnetic resonance imaging; Rattus norvegicus

Received: September 25, 2020; Accepted: April 20, 2021; Published: September 30, 2021  Show citation

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Cococcetta C, Del Signore F, Cerasoli I, Di Guardo G, Baffoni M, Di Francesco G, et al.. Intracranial meningioma in a pet rat: MRI findings. Vet Med - Czech. 2021;66(9):406-412. doi: 10.17221/191/2020-VETMED.
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