Negativity for CD45 also called leukocyte common antigen was observed in 13.2% B-ALL cohort and was comparable to Seegmiller et al.23 Absence of CD10 expression was observed in 5-18.8% reported in eastern and western studies17,23 and similar frequency (5.3%) was reported in current study. This evidence concerns the gene PTPRC and acute lymphoblastic leukemia.