MKI67 and meningioma: Association between Ki-67 mitotic index and RFS of meningioma patients was meta-analyzed using 35 studies [14–17, 25, 30–33, 35, 36, 38, 39, 41, 43, 56–58, 63, 64, 66, 74, 79, 81, 84, 86, 89, 92, 99, 107, 108, 111, 113, 118] with 6,474 participants.