The Philadelphia chromosome is often associated with which leukemia?

The Philadelphia chromosome is often associated with which leukemia?

• A. Chronic myeloid leukemia.
• B. Acute myeloid leukemia.
• C. Acute lymphoblastic leukemia.
• D. Chronic lymphocytic leukemia.

Answer: (A)

The Philadelphia chromosome is a translocation that creates the BCR-ABL fusion protein with constitutive tyrosine kinase activity, driving uncontrolled proliferation of myeloid cells. This molecular change is the hallmark finding in chronic myeloid leukemia, making CML the leukemia most strongly associated with it. While a Philadelphia chromosome can appear in some cases of acute lymphoblastic leukemia and is rare in acute myeloid leukemia, the classic and most frequent association is with chronic myeloid leukemia. This connection also explains why targeted therapy with tyrosine kinase inhibitors, like imatinib, is effective in CML.

The Philadelphia chromosome is a translocation that creates the BCR-ABL fusion protein with constitutive tyrosine kinase activity, driving uncontrolled proliferation of myeloid cells. This molecular change is the hallmark finding in chronic myeloid leukemia, making CML the leukemia most strongly associated with it. While a Philadelphia chromosome can appear in some cases of acute lymphoblastic leukemia and is rare in acute myeloid leukemia, the classic and most frequent association is with chronic myeloid leukemia. This connection also explains why targeted therapy with tyrosine kinase inhibitors, like imatinib, is effective in CML.