INTRODUCTION;
Acute lymphoblastic leukemia /lymphoma (LBL) is a clonal hematopoietic stem cell disorder of B or T cell origin. LBL comprise approximately 30% of childhood Non Hodgkin Lymphomas. Chronic myeloid leukaemia (CML) constitutes 2–3% of leukaemia in children. Atypical CML (BCR-ABL negative) is a challenging myeloid malignancy with features of both myeloproliferative and myelodysplastic syndromes. The diagnosis of both myeloid and lymphoid neoplasms in a single patient, whether simultaneous or sequential, is extremely rare, with an overall incidence of less than 1% 1. Our reported case has concurrent T Lymphoblastic Lymphoma and BCR-ABL Negative CML, which has never been reported in the literature before.