NCIt definition : A clonal B-cell lymphoproliferative disorder arising as a result of post-transplant
immunosuppression therapy. It is characterized by destructive infiltration of lymph
nodes and extranodal sites by a monotonous population of transformed B-lymphocytes
or plasma cells. The clonal cellular infiltrates fulfill the criteria for a diffuse
large B-cell lymphoma, Burkitt lymphoma, or a plasma cell neoplasm.;