cute Lymphoblastic Leukemia ( Adult ) Including Lymphoblastic lymphoma

ALL is now diagnosed and classified according to the WHO classification of neoplastic disease of hematopoietic and lymphoid tissues [2]. ALL is defined by the presence of ≥ 20% lymphoblasts in the marrow or peripheral blood. This is a change from the previous FAB classification, which required ≥ 30% blasts [3]. The relationship between ALL and lymphoblastic lymphoma remains unclear. Under the WHO classification both are grouped together under the category lymphoblastic leukemia/lymphoma [2]. Patients who present as lymphoma typically have a precursor T-cell immunophenotype (80%), whereas patients who present as leukemia generally have a precursor B-cell immunophenotype.