Spinal meningiomas in dogs: Description of 8 cases including a novel radiological and histopathological presentation

Martí Pumarola Batlle, Sonia Añor Torres, Cristian De La Fuente Hernandez, Roberto José-López

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9 Citations (Scopus)

Abstract

Clinical, imaging, and histological features of 8 canine spinal meningiomas, including a cervical cystic meningioma with imaging and intraoperative features of an arachnoid cyst, are described. All meningiomas were histologically classified and graded following the international World Health Organization human classification for tumors. Six meningiomas were located in the cervical spinal cord. Myelography showed intradural/ extramedullary lesions in 3/4 cases. Magnetic resonance imaging revealed hyperintense intradural/extramedullary masses on pre-contrast T1-weighted and T2-weighted images with homogeneous contrast enhancement in 7/8 cases. One dog had a cerebrospinal fluid-filled subarachnoid cavity dorsal to the cervical spinal cord. A spinal arachnoid cyst was diagnosed on imaging, but the histopathological study of the resected tissue revealed a grade I méningothélial cystic meningioma. There were no differences in outcome associated with tumor grade and surgical treatment (6/8). Cystic meningioma should be considered in the differential diagnosis of intraspinal cystic lesions, and biopsy is necessary for definitive diagnosis.
Original languageEnglish
Pages (from-to)948-954
JournalCanadian Veterinary Journal
Volume54
Issue number10
Publication statusPublished - 1 Oct 2013

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