Lymphocyte data in Epstein-Barr-virus induced post-transplant lymphoproliferative disorder treated by rituximab.

Viral infection is an important cause of morbidity and mortality in the post-allograft period. Recently, a new therapeutic approach was developed in post-transplant lymphoproliferative disorder (PTLD) induced by Epstein-Barr virus (EBV): the anti-CD20 monoclonal antibody or rituximab. We performed a single-center study on the treatment effectiveness of rituximab in three EBV-induced PTLD and evaluated biologic data, such as T and B lymphocytes count, during PTLD development and treatment. Before PTLD treatment, blood cell profile showed a severe T lymphopenia with a progressive increase of CD8+ cells and B lymphopenia. Secondly, during treatment, there appeared a T response, as in primary EBV, and a regressive B lymphopenia.