Relatedly, Driver et al. designed another integrated grading scheme incorporating mitotic count, and loss of chromosomes 1p, 3p, 4, 6, 10, 14q, 18, 19, or CDKN2A was also shown to more accurately identify meningiomas PFS and risk for recurrence, relative to WHO grading [91]. The gene discussed is CDKN2A; the disease is meningioma.