Genomic profiling distinguishes familial multiple and sporadic multiple meningiomas

DSpace/Manakin Repository

Genomic profiling distinguishes familial multiple and sporadic multiple meningiomas

Citable link to this page

. . . . . .

Title: Genomic profiling distinguishes familial multiple and sporadic multiple meningiomas
Author: Engler, David A; Roy, Jennifer; Shen, Yiping; Nunes, Fabio Pereira; Stemmer-Rachamimov, Anat; James, Marianne F.; Mohapatra, Gayatry; Plotkin, Scott Randall; Betensky, Rebecca Aubrey; Ramesh, Vijaya; Gusella, James Francis

Note: Order does not necessarily reflect citation order of authors.

Citation: Shen, Yiping, Fabio Nunes, Anat Stemmer-Rachamimov, Marianne James, Gayatry Mohapatra, Scott Plotkin, Rebecca A. Betensky, et al. 2009. Genomic profiling distinguishes familial multiple and sporadic multiple meningiomas. BMC Medical Genomics 2: 42.
Full Text & Related Files:
Abstract: Background: Meningiomas may occur either as familial tumors in two distinct disorders, familial multiple meningioma and neurofibromatosis 2 (NF2), or sporadically, as either single or multiple tumors in individuals with no family history. Meningiomas in NF2 and approximately 60% of sporadic meningiomas involve inactivation of the NF2 locus, encoding the tumor suppressor merlin on chromosome 22q. This study was undertaken to establish whether genomic profiling could distinguish familial multiple meningiomas from sporadic solitary and sporadic multiple meningiomas. Methods: We compared 73 meningiomas presenting as sporadic solitary (64), sporadic multiple (5) and familial multiple (4) tumors using genomic profiling by array comparative genomic hybridization (array CGH). Results: Sporadic solitary meningiomas revealed genomic rearrangements consistent with at least two mechanisms of tumor initiation, as unsupervised cluster analysis readily distinguished tumors with chromosome 22 deletion (associated with loss of the NF2 tumor suppressor) from those without chromosome 22 deletion. Whereas sporadic meningiomas without chromosome 22 loss exhibited fewer chromosomal imbalance events overall, tumors with chromosome 22 deletion further clustered into two major groups that largely, though not perfectly, matched with their benign (WHO Grade I) or advanced (WHO Grades II and III) histological grade, with the latter exhibiting a significantly greater degree of genomic imbalance (P < 0.001). Sporadic multiple meningiomas showed a frequency of genomic imbalance events comparable to the atypical grade solitary tumors. By contrast, familial multiple meningiomas displayed no imbalances, supporting a distinct mechanism for the origin for these tumors. Conclusion: Genomic profiling can provide an unbiased adjunct to traditional meningioma classification and provides a basis for exploring the different genetic underpinnings of tumor initiation and progression. Most importantly, the striking difference observed between sporadic and familial multiple meningiomas indicates that genomic profiling can provide valuable information for differential diagnosis of subjects with multiple meningiomas and for considering the risk for tumor occurrence in their family members.
Published Version: doi:10.1186/1755-8794-2-42
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2716362/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:4889576

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters