Post-transplant lymphoproliferative disorders.

Post-transplant lymphoproliferative disorder is the most common malignancy, with the exception of skin cancer, after solid organ transplantation in adults. The incidence varies according to the transplanted organ and is often associated with Epstein-Barr virus. Prognosis is variable, due in part to the heterogeneity of the disease, which ranges from reactive plasmacytic hyperplasia to aggressive monoclonal disease.