BAP1 and neoplasm: 6p+ Was usually present in 100% of tumor cells in SF3B1-mutant tumors but only in a subclone in EIF1AX-mutant and BAP1-mutant tumors; 8q+ was usually present in 100% of tumor cells in SF3B1-mutant and BAP1-mutant tumors but was rarely present in EIF1AX tumors.