CD34 and precursor B-cell acute lymphoblastic leukemia: The reported frequency of CD34 in B-ALL from previous Indian studies ranges from 30%-81.3% (Gujral et al., 2009; Sharma et al., 2016; Birva et al., 2019; Gupta et al., 2019) and in studies from other parts of the world is also in similar range of 47.8% to 83% (Thalhammer-Scherrer at al., 2002; Dakka et al., 2009; Jaafar et al., 2018; Rezaei et al., 2020).