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
Answer is A. Acute lymphoblastic leukemias of the L3 subtype are tumors of Mature B cell ( ref Robbins 7th /677,9th/590)