Microscopically, tumor atypia is prominent, necrosis is common, and the BRAF, NRAS, and KIT gene variants are common.[11] Melanocytoma is relatively benign, with uniform cell morphology, small atypia, no hemorrhage and necrosis, mitosis 0 to 1/10HPF, and no infiltration in adjacent tissues.[12] Microscopically, the tumor cells of melanotic meningioma are arranged in a swirly shape, and the meningeal skin cells can be seen. This evidence concerns the gene NRAS and meningioma.