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Published Online First: 24 June 2005. doi:10.1136/jmg.2005.035162
Journal of Medical Genetics 2006;43:285-287
Copyright © 2006 by the BMJ Publishing Group Ltd.

LETTER TO JMG

Age associated increase in the prevalence of chromosome 22q loss of heterozygosity in histological subsets of benign meningioma

M E Baser1, T Y Poussaint2

1 Los Angeles, CA, USA
2 Department of Radiology, Children’s Hospital and Harvard Medical School, Boston, MA, USA

Correspondence to:
Dr T Y Poussaint
Associate Professor of Radiology, Harvard Medical School, Director, PBTC Neuroimaging Center, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA; tina.poussaint{at}childrens.harvard.edu

Chromosome 22q loss of heterozygosity (LOH) is the most common allelic loss in benign meningioma and is thought to be the earliest initiating event in meningioma formation. We used published data and logistic regression to evaluate the association of 22q LOH with age at diagnosis in 318 transitional, fibroblastic, and meningothelial meningiomas. After adjustment for anatomical location, the odds ratio of 22q LOH per year of age was >1 in each histological type of meningioma, and was significantly >1 in transitional and fibroblastic meningioma. This finding is compatible with involvement of the neurofibromatosis 2 tumour suppressor gene, NF2, on chromosome 22q in the high incidence of benign meningioma in the elderly.

Keywords: meningioma; LOH; NF2; histology; age


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