CCNB3 and malignant peripheral nerve sheath tumor: In a previous study, molecular array analysis of 51 pediatric tumors revealed overlaps between malignant intracranial MEM and malignant peripheral nerve sheath tumors.[16] Recently, MEM with BCOR-CCNB3 gene fusion has also been detected.[17] However, among adult cases, only 2 have undergone relevant sequencing analysis to date.