title: Chromosome 1p36 and 22qter deletions in paraffin block sections of intracranial meningiomas.
abstract: Meningiomas are the most frequent benign tumors of the intracranial cavity. The classification and underlying pathogenetic mechanisms have been reported to be investigated by both pathological and genetic methods. In this study, we aimed to detect 1p36 and 22qter deletions by fluorescence in situ hybridization (FISH) in archival materials of 50 intracranial meningioma patients. The clinical material consisted of paraffin-embedded tissue sections from 50 patients who were surgically treated and had histopathologic diagnosis of an intracranial meningioma. We observed 1p36 deletion in 23/50 (46%) and 22qter deletion in 33/50 (66%) patients. In addition, we observed 22qter deletion in 26/36 (72.2%) patients with meningothelial meningioma. This finding implies that 22qter deletion might play an important role in the pathogenesis of meningothelial meningioma. On the other hand, no alterations were documented in the frequency of these chromosomal alterations according to the grade of meningiomas, suggesting that malignant progression of these tumors depends on other, more relevant, genetic changes.
authors.affiliation: Department of Medical Genetics, Baskent University Faculty of Medicine, Ankara, Turkey.
authors.forename: Zerrin
authors.initials: Z
authors.lastname: Yilmaz
authors.forename: Feride Iffet
authors.initials: FI
authors.lastname: Sahin
authors.forename: Basar
authors.initials: B
authors.lastname: Atalay
authors.forename: Ozlem
authors.initials: O
authors.lastname: Ozen
authors.forename: Hakan
authors.initials: H
authors.lastname: Caner
authors.forename: Murad
authors.initials: M
authors.lastname: Bavbek
authors.forename: Beyhan
authors.initials: B
authors.lastname: Demirhan
authors.forename: Nur
authors.initials: N
authors.lastname: Altinörs
mesh_terms: D000328:Adult; D000368:Aged; D002872:Chromosome Deletion; D002878:Chromosomes, Human, Pair 1 / Q000235:genetics*; D002892:Chromosomes, Human, Pair 22 / Q000235:genetics*; D003627:Data Interpretation, Statistical; D018450:Disease Progression; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008577:Meningeal Neoplasms / Q000235:genetics*; D008579:Meningioma / Q000235:genetics*; D008875:Middle Aged