In contrast, another proband had two pathogenic variants in genes linked with highly overlapping conditions, and all their phenotypes were potentially attributable to either NF1 (Neurofibromatosis-Noonan syndrome [MIM: 601321]) or CBL (Noonan syndrome-like disorder with or without juvenile myelomonocytic leukemia [MIM: 613563]). Here, CBL is linked to juvenile myelomonocytic leukemia.