Epstein–Barr virus positive diffuse large B‐cell lymphoma transformed into angioimmunoblastic T‐cell lymphoma after treatment

Angioimmunoblastic T-cell lymphoma (AITL) is the subtype of mature T-cell non-Hodgkin lymphoma. Compared with diffuse large B-cell lymphoma (DLBCL), AITL patients are frequently accompanied with Epstein-Barr virus (EBV) infection. To date, there is no report on the subsequent development of AITL in patients with EBV-positive DLBCL. We performed a rare case of EBV-positive AITL developing one year after initial diagnosis of EBV-positive DLBCL. The patient showed poor response to the chemotherapy regimen, and poor survival.