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Correlation between localization, age, and chromosomal imbalances in ependymal tumours as detected by CGH
Author(s) -
Jeuken Judith W. M.,
Sprenger Sandra H. E.,
Gilhuis Job,
Teepen Hans L. J. M.,
Grotenhuis Andre J.,
Wesseling Pieter
Publication year - 2002
Publication title -
the journal of pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.964
H-Index - 184
eISSN - 1096-9896
pISSN - 0022-3417
DOI - 10.1002/path.1086
Subject(s) - comparative genomic hybridization , pathology , lateral ventricles , ependymal cell , biology , spinal cord , ependyma , ependymoma , medicine , central nervous system , genetics , gene , genome , neuroscience
Ependymal tumours (ETs) are gliomas that arise from the ependymal lining of the cerebral ventricles and from the remnants of the central canal of the spinal cord. Both clinical and genetic studies suggest that distinct genetic subtypes of ETs exist, the subtypes being correlated with patient age and/or tumour site. In the present study, the tumour genome of 20 ETs (15 adult and five paediatric cases) was screened for chromosomal imbalances by comparative genomic hybridization (CGH). The most frequently detected imbalances were −22q (75%), −10q (65%), −21 (50%), −16p (50%), −1p (45%), +4q (45%), −10p (45%), −2q (40%), −6 (40%), −19 (40%), −2p (35%), −3p (35%), and −16q (35%). Comparison of the chromosomal imbalances detected in ETs with those previously reported in oligodendroglial and astrocytic tumours revealed that in this respect ETs show similarities to these other gliomas. By combining these results with those of a recent study of Zheng et al . and Hirose et al ., it was found that although ETs from different sites and from adult and paediatric patients show overlap at the CGH level, some chromosomal imbalances occur predominantly in a certain category. In adult patients, spinal ETs relatively often showed +2, +7, +12, and −14q; infratentorial ETs −22; and supratentorial ETs −9. In addition, in posterior fossa ETs, −6 and +9 were much more frequent in adults than in children. It is concluded that the genetic background of ETs is complex and partly determined by tumour site, histopathological subtype, and age of the patient. Copyright © 2002 John Wiley & Sons, Ltd.