Notably, surface markers used for immunophenotypic classification of ETP-ALL (expression of CD7, absence of CD1A and CD8, weak expression of CD5 and presence of myeloid markers such as CD13, CD33, CD34 and CD177/KIT23,29), were expressed accordingly in CIMP, but not those that define T/M MPAL (presence of either MPO or monocytic markers like CD11c, CD14, CD64 or LZE, concomitantly with CD3 expression20). Here, CD5 is linked to acute lymphoblastic leukemia.