Good prognosis factors of ALL are all except
**Core Concept**
Acute Lymphoblastic Leukemia (ALL) is a heterogeneous group of malignancies characterized by the clonal expansion of lymphoid progenitor cells. Prognosis in ALL is determined by a combination of clinical, biological, and molecular factors.
**Why the Correct Answer is Right**
The correct answer involves identifying factors that do not contribute to a favorable prognosis in ALL. The most significant good prognosis factors include:
* Age ( 10 years)
* WBC count at diagnosis (< 50,000/ΞΌL)
* Presence of the ETV6-RUNX1 fusion gene
* High hyperdiploidy (51-65 chromosomes)
* Low or absent minimal residual disease (MRD) at the end of induction therapy
**Why Each Wrong Option is Incorrect**
**Option A:** Not a specific prognostic factor, but one of the common presentations of ALL. ALL often presents with symptoms like anemia, thrombocytopenia, and infections.
**Option B:** Age is a prognostic factor in ALL, with infants ( 10 years) having a better prognosis than children between 1-10 years.
**Option C:** The L1 morphology is not a good prognostic factor; in fact, it is associated with a poorer prognosis. Patients with L1 morphology have a higher risk of relapse.
**Option D:** Not a prognostic factor in ALL. The presence of the MLL gene rearrangement is associated with a poorer prognosis.
**Clinical Pearl / High-Yield Fact**
The ETV6-RUNX1 fusion gene is a strong predictor of a favorable prognosis in pediatric ALL. Patients with this genetic abnormality have a higher likelihood of achieving long-term remission and survival.
**Correct Answer:** C. L1 morphology is associated with a poorer prognosis in ALL.