title: Posterior Fossa Tumors in Adult Patients.
abstract: In adults, the most common expansile "mass" lesion in the posterior fossa is a subacute stroke, whereas the most common neoplastic lesion in the posterior fossa is cerebellar metastasis (intra-axial) or vestibular schwannoma (extra-axial). Those diseases fall outside the scope of this article, which focuses on primary intra-axial tumors of the posterior fossa in adults. This category of tumors is uncommon and more frequently encountered in children. This article reviews tumors of the cerebellum, brainstem, and fourth ventricle that are seen in adult patients, following categories from the 2007 World Health Organization classification of central nervous system tumors.
authors.affiliation: American Institute for Radiologic Pathology, 1100 Wayne Avenue, Suite 1020, Silver Spring, MD 20910, USA. Electronic address: ryshih@gmail.com.
authors.forename: Robert Y
authors.initials: RY
authors.lastname: Shih
authors.affiliation: MedPix, National Library of Medicine, 8600 Rockville Pike, Bethesda, MD 20894, USA; Department of Radiology, George Washington University, 2121 Eye Street Northwest, Washington, DC 20052, USA.
authors.forename: James G
authors.initials: JG
authors.lastname: Smirniotopoulos
mesh_terms: D000328:Adult; D001921:Brain / Q000000981:diagnostic imaging; D006801:Humans; D015192:Infratentorial Neoplasms / Q000000981:diagnostic imaging*; D059906:Neuroimaging / Q000379:methods*; D014057:Tomography, X-Ray Computed
keywords: Adult posterior fossa tumors; Brainstem; Cerebellum; Fourth ventricle