CNTNAP1 and chronic myelogenous leukemia, BCR-ABL1 positive: The p190 protein lacks the DH–PH domain and when associated with CML is often associated with a monocytosis, absence of splenomegaly and bone marrow morphology which is intermediate between CML and chronic myelomonocytic leukaemia with inferior outcome and short-lived responses to TKIs (Gandhe et al., 2021).