CCNB3 and synovial sarcoma: Nine fusion genes were specific to particular histotypes, including SYT::SSX fusion in synovial sarcoma, EWSR1::FLI1 fusion in ES, EWSR1::NR4A3 fusion in EMC, BCOR::CCNB3 fusion in sarcoma with BCOR genetic alterations, and EWSR1::CREB3L1 fusion in sclerosing epithelioid fibrosarcoma.