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. 2014 May 21;25(2):193–201. doi: 10.1111/bpa.12150

Table 3.

Common genomic alterations in orbital meningiomas. Abbreviations: Ob = intraorbital ectopic meningiomas; ON = optic nerve sheath meningiomas; Sph‐Ob = spheno‐orbital meningiomas

Genomic alteration No. of cases Percentage (%)
Sph‐Ob ON Ob Sph‐Ob ON Ob
del(22q) or −22 7/10 1/5 3/4 70 20 75
del(1p) 5/10 1/5a 0/4 50 20a 0
del(6q) 5/10 0/5 0/4 50 0 0
del(19p) 5/10 2/5 0/4 50 40 0
a

The deleted region on chromosome 1p in this particular case is different from those detected in Sph‐Ob meningiomas (see Table 2).