<prompt> A Child with kidney transplant developed lymphoproliferative cancer. The most common virus implicated is:CMVVaricellaHPVEBV  <response>: Answer is D EBV: The most common virus implicated in Post-Transplant-Lymphoprohftrative-Disorder PTLD is Epstein Barr Virus EB V. Post-Transplant Lymphoproliferative Disease PTLD is a well-recognized complication of both solid organ transplantation SOT and allogeneic hematopoietic stem cell transplantation HSCT. It is one of the most common post-transplant malignancies. In most cases, PTLD is associated with Epstein-Barr virus.EBV infection of B cells, either as a consequence of reactivation of the virus post-transplantation or from primary EBV infection. In cases of primary infection, EBV may be acquired from the donor graft or, less commonly, from environmental exposure. 