title: [Solitary fibrous tumor of the fourth ventricle: case report].
abstract: A rare case of solitary fibrous tumor, located wholly within the fourth ventricle, is reported. A 57-year-old male presented with headache and nausea. The preoperative magnetic resonance images revealed a well circumscribed mass in the fourth ventricle that exhibited a low intensity on T1-weighted images and homogeneously enhanced with gadolinium. Vertebral angiogram revealed a tumor stain supplied from the choroidal branches of the posterior inferior cerebellar artery. The tumor was totally resected through a midline suboccipital approach. Histologically, the tumor was composed of spindle-shaped cells growing in fascicles within a collagenous matrix. Immunohistochemical staining demonstrated vimentin and the CD34 positivity of tumor cells. Solitary fibrous tumor is a newly described entity, which should be considered in the differential diagnosis for dural-based lesions.
authors.affiliation: Department of Neurosurgery, Jikei University School of Medicine, Kashiwa Hospital, 163-1 Kashiwashita, Kashiwa, Chiba 277-8567, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Sawauchi
authors.forename: Hideki
authors.initials: H
authors.lastname: Arakawa
authors.forename: Keisuke
authors.initials: K
authors.lastname: Taya
authors.forename: Tohru
authors.initials: T
authors.lastname: Terao
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Nakazaki
authors.forename: Robert Tomohiko
authors.initials: RT
authors.lastname: Numoto
authors.forename: Yoshitaro
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Takuo
authors.initials: T
authors.lastname: Hashimoto
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yamaguchi
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Abe
mesh_terms: D002551:Cerebral Ventricle Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D020546:Fourth Ventricle; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D018218:Neoplasms, Fibrous Tissue / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*