Carboxy Methyl Lysine [HRP]

Chronic myeloid leukemia (CML) is a myeloproliferative disorder associated with the Philadelphia chromosome t (9;22) and the BCR-ABL fusion gene. The condition is relatively rare, accounting for 2.0% to 3.0% of childhood leukemia cases. CML has historically been a triphasic disease. Most patients are diagnosed in chronic phase. Without treatment, it inevitably progresses into a more aggressive accelerated phase and blast crisis. Some proportion of CML cases of blastic transformation develop an extramedullary disease that involves rarely central nervous system. This report describe an extremely rare case of 13-year-old girl with CML and extramedullary blast crisis in the central nervous system. Treatment options and monitoring of disease response are discussed.

We reported a rare case of chronic myeloid leukaemia (CML) complicated with pulmonary leucostasis in an 11-year-old Down syndrome (DS) patient who presented with respiratory distress. His peripheral blood investigation showed features of CML with 17% circulating blast, with immunophenotyping showing positivity towards myeloid markers. Peripheral blood polymerase chain reaction for BCR-ABL fusion transcripts was positive, and cytogenetic studies showed Ph chromosome with trisomy 21. Despite cytoreduction therapy with hydroxyurea and leukapheresis, the patient succumbed due to shock, with multiple organ failure. Our case highlights the need for early detection and rapid referral for aggressive treatment in DS patients with CML, as the combination is associated with a poor outcome.