Arises due to Philadelphia chromosome t(22;9) The BCL- ADR oncogene
- Marked leukocytosis with left shift (<200×10^9)
- Normocytic normochromic anaemia
- Increase in basophils and platelets
- Hypercellular bone marrow (granulopoietic predominant)
- High serum uric acid
Clinical Features
- Hypermetabolism
- Splenomegaly
- Features of anaemia
- Abnormal platelet count
- Renal diseases
- Rare visual disturbance, priapism
Staging
- Chronic phase: more than 10% blasts
- Accelerated phase: 15-30% blasts, 20% basophils and thrombocytopenia
- Blasts phase: more than 20% blasts, it is acute and respond poorly to treatment