Anatomy Haematology f1ce051a ALL L3 morphology is a malignancy arising from which cell lineage? A Mature B xell B Precursor Bcell C Immature T cell D Mixed B cell and T cell High-Yield Explanation Acute lymphoblastic leukemias of the L3 subtype are tumors of Mature B cell ( ref Robbins 7th /677,9th/590)