- For Cohort 2, Ph-like testing is not required specifically for this study; however, to be registered to Cohort 2 under the Ph-like DSMKF criterion, the patient must have a known or presumed activating Ph-like signature and dasatinib-sensitive mutation or kinase fusion, such as: ABL1, ABL2, colony stimulating factor 1 receptor (CSF1R), platelet derived growth factor receptor beta (PDGFRB), platelet derived growth factor receptor alpha (PDGFRA), or fibroblast growth factor receptor (FGFR)s that was otherwise identified as part of normal standard of care; prior to registering any patients with a known or presumed activating Ph-like signature and dasatinib-sensitive mutations or kinase fusions (DSMKF) treating physicians must confirm eligibility with the study chairs via email; the study chairs must respond via email with confirmation of patient eligibility prior to patient registration