LMO2 and acute lymphoblastic leukemia: Aberrant expression of LMO2 in hematopoietic stem/progenitor cells (HSC/PC) or in immature T cells (present in the thymus) leads to thymocyte self‐renewal, early lymphoid precursor's accumulation, and transformation to T‐ALL (McCormack et al, 2010; Treanor et al, 2011; Cleveland et al, 2013; Chambers & Rabbitts, 2015).