Your brother has T-cell Acute Lymphoblastic Leukemia (T-ALL).

This is clearly stated at the bottom of the report under “Impression”:

T-cell Acute lymphoblastic leukemia (T-ALL)

2. What T-ALL means

• Acute → fast-growing, needs treatment urgently
• Lymphoblastic → affects immature white blood cells (blasts)
• T-cell → the cancer is coming from T-lymphocytes (a type of immune cell)
• Leukemia → cancer of the blood and bone marrow

So, his bone marrow is producing a very large number of abnormal T-cell blasts instead of normal blood cells.

3. How severe it is (from this report)

• 81% of his bone marrow cells are leukemic blasts
  
  • This is high, confirming active leukemia
• These abnormal cells:
  
  • Are immature
  • Are not behaving like normal blood cells
• This explains symptoms like:
  
  • Neck swelling
  • Enlarged lymph nodes
  • Likely fatigue, infections, anemia (even if not listed here)

4. Why doctors are confident about the diagnosis

They used flow cytometry, a very accurate test, to look at CD markers (cell surface proteins).

The leukemic cells:

• Strongly express T-cell markers:
  
  • CD2, CD3, CD7, CD99 → positive
• Do NOT express:
  
  • B-cell markers
  • Myeloid markers
  • NK-cell markers

This pattern specifically fits T-ALL, not any other leukemia.

Is this curable