Driver et al. recently proposed a three-tiered integrated molecular grading of meningiomas based on the presence of several chromosomal deletions (1p, 3p, 4p/q, 6p/q, 10p/q, 14q, 18p/q, and 19p/q), CDKN2A/B deletion, and mitotic count [6]. The gene discussed is CDKN2A; the disease is meningioma.