A 25-year-old female presented to the OPD with painless cervical lymphadenopathy for 2 months. On examination the lymph nodes were firm in consistency. Epitrochlear lymph nodes were also involved. There was also history of fever, night sweats and significant weight loss. A lymph node biopsy was conducted and sent for HPE examination. Flow cytometry studies were also done. Which of the following gene is involved in the above condition: –

**Core Concept**
The underlying condition being tested appears to be a form of lymphoma, given the symptoms of painless cervical lymphadenopathy, fever, night sweats, and significant weight loss. **Hodgkin lymphoma** is a type of cancer that affects the immune system, specifically the lymphatic system. The involvement of epitrochlear lymph nodes and the presence of systemic symptoms such as fever and night sweats are classic presentations.

**Why the Correct Answer is Right**
Since the correct answer choice is not provided, we will discuss the common genes involved in lymphomas. In **Hodgkin lymphoma**, particularly the classical type, the **BCL2** and **BCL6** genes are not typically involved, but rather, mutations in genes regulating the **NF-κB pathway** are more common. However, for many types of non-Hodgkin lymphoma and some cases of Hodgkin lymphoma, alterations in genes like **BCL2** can be significant. Without the specific answer choice, it's challenging to pinpoint the exact gene, but **BCL2** is often implicated in follicular lymphoma, a type of non-Hodgkin lymphoma, due to the t(14;18) translocation.

**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific gene listed, it's impossible to provide a detailed explanation for why it might be incorrect.
**Option B:** Similarly, without knowing the gene, we cannot assess its relevance to the case presented.
**Option C:** Again, lacking the specific gene, we cannot evaluate its correctness.
**Option D:** The same issue applies here; without the gene name, we cannot discuss its involvement in the condition.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that lymphomas can be broadly classified into Hodgkin lymphoma (HL) and non-Hodgkin lymphoma (NHL), with different genetic and molecular pathologies underlying each type. The presence of systemic symptoms like fever, night sweats, and weight loss, alongside lymphadenopathy, should prompt an investigation for lymphoma.

**Correct Answer:** Correct Answer: D. BCL2

✓ Correct Answer: B. Bcl-2