Lymphoma is caused by all of the following viruses except –
**Core Concept**
Lymphomas are a group of cancers that arise from the lymphocytes, a type of white blood cell. Certain viruses have been associated with the development of lymphomas, particularly those that infect lymphocytes.
**Why the Correct Answer is Right**
Epstein-Barr Virus (EBV) is a well-established cause of lymphomas, particularly Burkitt lymphoma and Hodgkin lymphoma. EBV infects B lymphocytes and can lead to their transformation into malignant cells. Another virus, Human T-lymphotropic virus (HTLV-1), is associated with adult T-cell leukemia/lymphoma. However, the correct answer is not among the options given.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because EBV is a well-established cause of lymphomas, making it a correct association.
**Option B:** This option is incorrect because HTLV-1 is also associated with lymphomas, specifically adult T-cell leukemia/lymphoma.
**Option C:** This option is incorrect because EBV and HTLV-1 are not the only viruses associated with lymphomas, but they are among the most well-established causes.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that EBV is a common cause of infectious mononucleosis (glandular fever) in young adults, which can sometimes be a precursor to lymphoma development.
**Correct Answer: A.**