en Pediatric Hematology & Oncology Pediatric Hematology & Oncology گزارش مورد Case report <p>Acute leukemia which is the most common cancer in children is a heterogeneous group of clonal malignancies. The conversion of the leukemic cell lineage during the course of the disease or later is termed lineage switch. It has been rarely reported in the literature. In leukemia lineage switch, conversions from lymphoblastic leukemia to myeloid leukemia or vice versa are reported. Herein, we report a 7-year-old child with acute lymphoblastic leukemia which switched to acute myeloid leukemia upon relapse.</p> Leukemia, Children, Cell lineage 86 87 http://ijbc.ir/browse.php?a_code=A-10-280-1&slc_lang=en&sid=1 Shiva Nazari 10031947532846003457 10031947532846003457 No Fatemeh Malek fmalek7721@gmail.com 10031947532846003458 10031947532846003458 Yes Navid Zavvar 10031947532846003459 10031947532846003459 No