CD99 and acute lymphoblastic leukemia: Coustan-Smith et al. introduced 22 new markers (CD44, BCL2, HSPB1, CD73, CD24, CD123, CD72, CD86, CD200, CD79b, CD164, CD304, CD97, CD102, CD99, CD300a, CD130, PBX1, CTNNA1, ITGB7, CD69, CD49f), which were expressed in 81.4% of ALL cases.