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Figure 2: (a) Bone marrow biopsy showing blasts: large cells having high nuclear to cytoplasmic ratio and hyperchromatic nuclei (H and E, ×40); (b) blasts showing strong nuclear immunopositivity for immature/precursor lymphoid cell marker TdT (×40); (c) blasts showing nuclear immunopositivity for pre-B cell marker Pax5 (×40)

Figure 2: (a) Bone marrow biopsy showing blasts: large cells having high nuclear to cytoplasmic ratio and hyperchromatic nuclei (H and E, ×40); (b) blasts showing strong nuclear immunopositivity for immature/precursor lymphoid cell marker TdT (×40); (c) blasts showing nuclear immunopositivity for pre-B cell marker Pax5 (×40)