CDKN2A and meningioma: Several molecular biomarkers are associated with classification and grading of meningiomas, including SMARCE1 (clear cell subtype), BAP1 (rhabdoid and papillary subtypes), KLF4/TRAF (secretory subtype), TERT promoter mutation and/or homozygous deletion of CDKN2A/B (WHO grade 3), H3K27me3 loss of nuclear expression (potentially worse prognosis), and methylome profiling (prognostic subtyping) [7,8,9,10,11].