NCAM1 and chronic myelogenous leukemia, BCR-ABL1 positive: Aberrant expression of CD56 has been identified in various hematological malignancies such as multiple myeloma [10], chronic myelomonocytic leukemia [11], CML [7], and plays a crucial role in the diagnosis of acute myeloid leukemia as well as minimal residual disease monitoring [12,13].