ALK and leukemia: In other leukemia cases, aberrant SALL4 expression has been reported in ALK positive anaplastic large cell lymphoma (ALK+ ALCL) [56], B cell acute lymphocytic leukemia (B-ALL), −most prominently in B-ALL patients with TEL-AML1 translocation, which is the most common genetic abnormality in pediatric B-ALL [57, 58].