Abstract
Plasma cell proliferative disorder (PCPD) developed in two patients with actively replicating hepatitis C virus (HCV) in neoplastic plasma cells after orthotopic liver transplantation for HCV-related end-stage liver disease. PCPD was confined to the transplanted liver and was associated with monoclonal proteins in blood. Bone marrow biopsy did not show any evidence of PCPD. Epstein-Barr virus was not detected by in situ hybridization in either case. In situ hybridization for HCV RNA with sense and antisense probes in liver biopsy specimens showed signals in neoplastic plasma cells as well as in hepatocytes. We suggest that our patients had posttransplant PCPD resulting from HCV. It may represent a new posttransplant disease entity different from previously described posttransplant lymphoproliferative disorder. The findings raise intriguing questions about the role of HCV in PCPDs in patients with chronic HCV infection.
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