True aboutALL-
**Core Concept**
ALL (Acute Lymphoblastic Leukemia) is a type of cancer that affects the blood and bone marrow, characterized by the uncontrolled growth of lymphoblasts, a type of immature white blood cell. The underlying principle being tested here relates to the pathophysiology and management of ALL.
**Why the Correct Answer is Right**
The correct answer is related to the fact that ALL is a highly sensitive disease to chemotherapy and radiation therapy, which are the primary treatment modalities for this condition. The disease is characterized by the presence of Philadelphia chromosome-positive (Ph+) cells in about 20-30% of cases, which can be targeted using tyrosine kinase inhibitors such as imatinib. The management of ALL involves a combination of chemotherapy, radiation therapy, and bone marrow transplantation in some cases.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the primary treatment modalities for ALL.
**Option B:** This option is incorrect because it is not a characteristic of ALL.
**Option C:** This option is incorrect because it is not a primary treatment modality for ALL.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the presence of the Philadelphia chromosome in ALL cases is a significant prognostic factor, and patients with this subtype have a poorer outcome compared to those without the Philadelphia chromosome.
**Correct Answer:** A.