Genetic Profiling by Single-Nucleotide Polymorphism-Based Array Analysis Defines Three Distinct Subtypes of Orbital Meningioma
| Autor: | Ho, Cheng-Ying, Mosier, Stacy, Safneck, Janice, Salomao, Diva R., Miller, Neil R., Eberhart, Charles G., Gocke, Christopher D., Batista, Denise A. S., Rodriguez, Fausto J. |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Adult
Male Chromosomes Human Pair 22 Optic Nerve Neoplasms Middle Aged Polymorphism Single Nucleotide Article nervous system diseases Young Adult Chromosomes Human Pair 1 otorhinolaryngologic diseases Humans Orbital Neoplasms Chromosomes Human Pair 6 Female Chromosome Deletion Meningioma neoplasms Chromosomes Human Pair 19 Aged |
| Popis: | Orbital meningiomas can be classified as primary optic nerve sheath (ON) meningiomas, primary intraorbital ectopic (Ob) meningiomas and spheno-orbital (Sph-Ob) meningiomas based on anatomic site. Single-nucleotide polymorphism (SNP)-based array analysis with the Illumina 300K platform was performed on formalin-fixed, paraffin-embedded tissue from 19 orbital meningiomas (5 ON, 4 Ob and 10 Sph-Ob meningiomas). Tumors were World Health Organization (WHO) grade I except for two grade II meningiomas, and one was NF2-associated. We found genomic alterations in 68% (13 of 19) of orbital meningiomas. Sph-Ob tumors frequently exhibited monosomy 22/22q loss (70%; 7/10) and deletion of chromosome 1p, 6q and 19p (50% each; 5/10). Among genetic alterations, loss of chromosome 1p and 6q were more frequent in clinically progressive tumors. Chromosome 22q loss also was detected in the majority of Ob meningiomas (75%; 3/4) but was infrequent in ON meningiomas (20%; 1/5). In general, Ob tumors had fewer chromosome alterations than Sph-Ob and ON tumors. Unlike Sph-Ob meningiomas, most of the Ob and ON meningiomas did not progress even after incomplete excision, although follow-up was limited in some cases. Our study suggests that ON, Ob and Sph-Ob meningiomas are three molecularly distinct entities. Our results also suggest that molecular subclassification may have prognostic implications. |
| Databáze: | OpenAIRE |
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