Which virus is implicated in Burkitts lymphoma? (E. REPEAT 2013)
**Core Concept**
Burkitt's lymphoma is a type of aggressive non-Hodgkin lymphoma characterized by the abnormal proliferation of B lymphocytes. The etiology of Burkitt's lymphoma is multifactorial, with genetic and environmental factors playing a crucial role. Specifically, the disease is associated with Epstein-Barr virus (EBV) infection, which is a member of the herpesvirus family.
**Why the Correct Answer is Right**
EBV infection is a significant risk factor for the development of Burkitt's lymphoma, particularly in African children. The virus integrates into the host genome and activates the c-myc oncogene, leading to uncontrolled cell proliferation and tumor formation. The EBV-associated Burkitt's lymphoma is characterized by the presence of the Epstein-Barr nuclear antigen (EBNA) and the early antigen (EA). The viral genome also influences the expression of B-cell surface antigens and modulates the host immune response.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Burkitt's lymphoma is not primarily associated with human T-lymphotropic virus (HTLV). HTLV is linked to adult T-cell leukemia/lymphoma.
**Option B:** This option is incorrect because hepatitis B virus (HBV) is associated with hepatocellular carcinoma, not Burkitt's lymphoma.
**Option C:** This option is incorrect because human immunodeficiency virus (HIV) is linked to various malignancies, including Kaposi's sarcoma and non-Hodgkin lymphoma, but not specifically to Burkitt's lymphoma.
**Clinical Pearl / High-Yield Fact**
Burkitt's lymphoma is characterized by its rapid growth rate and is often diagnosed at an advanced stage. The disease is more common in tropical regions and is associated with a higher incidence in children. Early diagnosis and treatment with chemotherapy and/or radiotherapy are essential for improving patient outcomes.
**Correct Answer: C. Epstein-Barr virus (EBV)**