NF2 and meningioma: DNA methylation profiling controlled for artifacts from chromosome copy number variants (CNVs) reveals meningiomas are comprised of Merlin-intact, Immune-enriched, and Hypermitotic DNA methylation groups7, which are concordant with groups and subgroups of meningiomas derived from RNA sequencing or DNA methylation profiling integrated with RNA sequencing, CNVs, and SSVs8,11,12.