Figure 2. T-cell lymphoblastic lymphoma/leukemia in bone marrow biopsy. Low magnification showing hypercellular marrow due to diffuse infiltration of neoplastic lymphoblasts. Note absence of nodules or fibrosis.
Figure 3. T-cell lymphoblastic lymphoma/leukemia. Cytology of lymphoblasts reveals medium sized cells with delicate unclumped chromatin, convoluted nuclear membrane and small but distinct nucleoli.
Figure 4. T-cell lymphoblastic lymphoma/leukemia. Effacement of lymph node architecture. Note absence of follicles and normal sinusoidal structures due to expansion of T-zone paracortical region by neoplastic T lymphoblasts.