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. Here, CD99 is linked to acute lymphoblastic leukemia.