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A17-year-old boy presented with TLC of 138x109/ L with 80% blasts on the peripheral smear. Chest X-ray demonsnstrated a large mediastinal mass. Immunophenotyping of this patent's blasts would most likely demonstrate:
No surface antigens (null phenotype)
An immature T cell phenotype (Tdt/CD34/CD7 positive)
Myeloid markers, such as CD13,CD33 and Cd15
B cell markers, such as CD19,CD20 and CD22
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