title: Spinal meningiomas in dogs: description of 8 cases including a novel radiological and histopathological presentation.
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 meningothelial 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.
authors.affiliation: Departament de Medicina i Cirurgia Animal (José-López, de la Fuente, Pumarola, Añor), and Fundació Hospital Clínic Veterinari (José-López, de la Fuente, Añor), Facultat de Veterinària. Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain.
authors.forename: Roberto
authors.initials: R
authors.lastname: José-López
authors.forename: Cristian
authors.initials: C
authors.lastname: de la Fuente
authors.forename: Martí
authors.initials: M
authors.lastname: Pumarola
authors.forename: Sonia
authors.initials: S
authors.lastname: Añor
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004285:Dogs; D005260:Female; D008297:Male; D008577:Meningeal Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D008579:Meningioma / Q000175:diagnosis / Q000473:pathology / Q000601:surgery / Q000662:veterinary*; D012189:Retrospective Studies