CML is characterised by all except –
**Core Concept**
Chronic Myeloid Leukemia (CML) is a **myeloproliferative neoplasm** characterized by the overproduction of mature and immature **granulocytes**. The underlying genetic abnormality is the **Philadelphia chromosome**, resulting from a reciprocal translocation between chromosomes 9 and 22, creating the **BCR-ABL1 fusion gene**. This gene leads to uncontrolled cell proliferation.
**Why the Correct Answer is Right**
Since the question is incomplete, let's discuss general characteristics of CML: it is marked by an increased number of **myeloid cells** in the bone marrow and peripheral blood, including **neutrophils**, **eosinophils**, and **basophils**. The **BCR-ABL1 tyrosine kinase** inhibits **apoptosis** and promotes cell growth.
**Why Each Wrong Option is Incorrect**
**Option A:** Without specific details, we can't assess its accuracy directly.
**Option B:** Similarly, without the option's content, its validity cannot be determined.
**Option C:** Same as above; the option's details are needed for evaluation.
**Option D:** Again, the specifics of this option are required to discuss its correctness.
**Clinical Pearl / High-Yield Fact**
A key point in CML is the presence of the **Philadelphia chromosome**, which is diagnostic and has implications for treatment, including the use of **tyrosine kinase inhibitors**.
**Correct Answer:** D. None of the above options are provided to evaluate.