MCAM and precursor B-cell acute lymphoblastic leukemia: Contrary to Cavazzini et al. [20] who found that the expression of CD146+ cells was detected in 38.8% of B-cell ALL (14/38) of his retrospective series of 162 leukemic patients (ALL+AML), Xie et al. [21] tried to compare the expression rates of CD146 in adult and children's B-ALL patients which were 29.17% and 9.09%, respectively, showing that this difference was significant (P < 0.05).