This study is about non-Hodgkin's lymphoma in HIV patients. Some still get a rare form of it even after treatment. Also talks about Epstein-Barr involvment. Not good news if we do have a retrovirus. But XMRV may be quite different from HIV of course. http://www.medscape.com/viewarticle/712732?src=mp&spon=17&uac=122598SZ Abstract Objective: Despite effective treatment of HIV infection, some patients still develop non-Hodgkin lymphoma (NHL). We analysed patients with HIV-associated NHL and undetectable plasma HIV-RNA, according to the duration of HIV suppression. Methods: Out of 388 patients included in a prospective cohort of HIV-associated NHL from 1996 to 2008, 128 (33%) had a plasma HIV-RNA below 500 copies/ml and were included in the study. Patients with long-term HIV suppression (>18 months) were compared with patients with recent HIV suppression (≤18 months). Results: All patients but three were treated with combination antiretroviral therapy, with a median duration of 2.2 years. The median duration of HIV suppression was 10.1 months. Most cases (65%) occurred within 18 months following HIV suppression. In the more than 18 months group, patients developed NHL at a higher CD4 cell count than patients with 18 months or less of HIV suppression (359 versus 270 cells/μl, P = 0.02). None of the NHL characteristics were different between the two groups. Outcome was similar in the two groups (complete remission, 64 versus 72.5%; P = 0.35 and 3-year survival, 46 versus 56%; P = 0.08). In addition, 52% of the tumours were Epstein-Barr virus or human herpesvirus 8 associated, without any difference in the proportion of virus-associated tumours according to the duration of HIV suppression. Conclusion: In patients with undetectable HIV-RNA, NHL occurred mainly within the first 18 months following HIV suppression. In patients developing NHL after long-term HIV suppression, the level of CD4 cell count was higher, but the association with Epstein-Barr virus or human herpesvirus 8 and the prognosis were similar to that observed in patients with recent HIV suppression.