BAP1 and neoplasm: Similarly we segregate our tumours into four categories based on CNAs: category 1 are chromosome 3 disomy (D3) tumours lacking chromosome 8q copy-number gain and frequently possessing EIF1AX mutations; category 2 are D3 UM with chromosome 6p and 8q gain and a high proportion of SF3B1 mutations; category 3 are chromosome 3 monosomy (M3) tumours lacking chromosome 8q gain dominated by BAP1 mutations; category 4 UMs are M3 with chromosome 8q gain and BAP1 mutations.