Pathology General 2c935440 ALL L3 morphology is a malignancy arising from which cell lineage - A Mature B cell B Precursor B cell C Immature T cell D Mixed B cell & T cell High-Yield Explanation • Acute Lymphoblastic Leukemias (ALL) of the L3 (FAB) subtype are tumors of Mature B-cells (e.g. Burkitt’s lymphoma)