title: Prognostic value of Ki-67 (MIB-1) and p53 in ependymomas.
abstract: To determine whether Ki-67 (MIB-1) and p53 have prognostic value in ependymomas, clinicopathologic study was undertaken in 29 patients with this tumor. The clinical course correlated well with the histological grade according to the World Health Organization (WHO) grading system, and it was the worst in patients with anaplastic ependymoma. The percent expression of MIB-1 and p53 correlated with the histological grade of malignancy. With regard to the subtypes of benign ependymoma, the clinical course was the worst in clear-cell ependymoma, which had a significantly higher expression of MIB-1 and p53 than the other subtypes. Tanycytic ependymoma showed the most benign clinical course and the lowest expression of MIB-1 and p53. Although the WHO grading generally tended to correlate with the clinical course of ependymomas, these two subtypes--clear-cell ependymoma and tanycytic ependymoma--exhibited biological properties different from those of other grade II ependymomas.
authors.affiliation: Department of Neurosurgery, Kitasato University School of Medicine, Kanagawa, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Suzuki
authors.forename: H
authors.initials: H
authors.lastname: Oka
authors.forename: N
authors.initials: N
authors.lastname: Kawano
authors.forename: S
authors.initials: S
authors.lastname: Tanaka
authors.forename: S
authors.initials: S
authors.lastname: Utsuki
authors.forename: K
authors.initials: K
authors.lastname: Fujii
mesh_terms: D000293:Adolescent; D000328:Adult; D014408:Biomarkers, Tumor / Q000032:analysis*; D001932:Brain Neoplasms / Q000737:chemistry* / Q000401:mortality / Q000473:pathology; D002648:Child; D002675:Child, Preschool; D004806:Ependymoma / Q000737:chemistry* / Q000145:classification / Q000401:mortality / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007564:Japan / Q000453:epidemiology; D019394:Ki-67 Antigen / Q000032:analysis*; D015993:Life Tables; D008297:Male; D008875:Middle Aged; D009363:Neoplasm Proteins / Q000032:analysis*; D009419:Nerve Tissue Proteins / Q000032:analysis*; D011379:Prognosis; D012189:Retrospective Studies; D016019:Survival Analysis; D016159:Tumor Suppressor Protein p53 / Q000032:analysis*
chemical_list: D014408:Biomarkers, Tumor; D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D009419:Nerve Tissue Proteins; D016159:Tumor Suppressor Protein p53