<prompt> Lymphoma is caused by all of the following viruses except -HIVEBVHSVHHV8  <response>: Ans. is c i.e., HSV The number of viruses associated with lymphoma has increased over the last 20 years, and includes the Epstein- Barr virus EBV, human T-cell lymphotropic virus 1 HTLV1, human immuno-deficiency virus HIV1 and 2 and human herpesvirus 8 HHV8. Some cause lymphoma by direct oncogenesis, for example EBV and Burkitts lymphoma. Others cause lymphoma in immunosuppressed patients, for example HHV8 in primary effusion lymphoma and Castlemans syndrome. Lymphomas in HIV patients arise directly due to HIV action on lymphocytes and secondary to AIDS, with up to 50 of these lymphomas associated with EBV. Hepatitis C virus HCV has only recently been recognized as a potential cause of Bcell lymphoma 