Anaplastic ependymomas: Clinical features and tumour suppressor gene p53 analysis

T. Tominaga, T. Kayama, T. Kumabe, Yukihiko Sonoda, T. Yoshimoto

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


We analyzed seven cases of anaplastic ependymoma, focusing on neuro-imaging, histopathology, and mutations of the tumour suppressor gene p53. Five of the seven tumours were supratentorial. All had both cystic and solid components, with fragment calcifications detectable on CT scan. The solid parts of the tumours were imaged as heterogenous hypo- or iso-intense areas with moderate enhancement on T1-weighted magnetic resonance images. Vascularity was not prominent on angiograms except for one case. Histologically, in addition to the WHO criteria, loss of typical cellular architecture, endothelial proliferation, and necrosis were commonly found. A mutation in Exon 5 of the tumour suppressor gene p53 was detected in one anaplastic ependymoma out of five tumours (two benign and three anaplastic ependymomas) examined by PCR-SSPC analysis of genomic DNA followed by direct sequencing. Anaplastic ependymoma typically presents as a calcified cystic tumour in the supratentorial parenchyma or transependyma. Mutations of p53 deserve further investigation to examine their possible role in the oncogenesis and malignant transformation of ependymoma.

Original languageEnglish
Pages (from-to)163-170
Number of pages8
JournalActa neurochirurgica
Issue number3-4
Publication statusPublished - 1995 Sep 1


  • Anaplastic ependymoma
  • tumour suppressor gene p53

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology


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