Chronic Myelogenous Leukemia Presenting as a Secondary Malignancy After BCR-ABL1-negative B-lymphoblastic Leukemia/Lymphoma in a Pediatric Patient.

Chronic myelogenous leukemia, BCR-ABL1 positive (CML) is a rare myeloproliferative neoplasm in children and presents even less often as a secondary malignancy in the pediatric population. Below, we report a patient with Philadelphia-negative B-lymphoblastic leukemia/lymphoma, who developed CML several years after achieving complete remission, and summarize the existing literature on the clinical and pathologic features of CML as a secondary pediatric malignancy.