A 15-year-old boy presents complaining of severe headaches; he has a white cell count of 76 x 10 9/L, platelet count of 55 x 10 9/L and a hematocrit of 33%. When a white cell differential is performed, most of the nucleated cells are blasts. They are CD2, CD4 and CD8 positive. What is the most likely diagnosis?

T cell acute lymphoblastic leukemia,

Explanation:

T cell acute lymphoblastic leukemia, commonly found in children  is a  fast-growing  increasing  type of leukemia also blood cancer in which too many T-cell lymphoblasts are found in the bone marrow and blood affecting them. the presentation of the 15 year old boy with white cell count of 76 x 10 9/L, platelet count of 55 x 10 9/L and a hematocrit of 33% when a white cell differential is performed shows there are problems relating to immature cells found in bone marrows and the white blood cells  which are an indication for this type of cancer.

obviously, the latter.