However, Ki-67 Pi values ranged from 2 to 6% and tumour diameters from ≤3 cm to >3 cm in meningiomas, whereas in gliomas, Ki-67 Pi values ranged from 2 to 80% and tumour diameters from ≤6 cm to >6 cm. The gene discussed is MKI67; the disease is central nervous system cancer.