title: Extramedullary plasmacytoma-like posttransplantation lymphoproliferative disorders: clinical and pathologic features.
abstract: Most monomorphic posttransplantation lymphoproliferative disorders (PTLDs) resemble diffuse large B-cell lymphoma or Burkitt lymphoma. Rare cases of PTLD resembling extramedullary plasmacytomas have also been described. This report describes the clinical, histologic, phenotypic, and genotypic findings in 4 cases of plasmacytoma-like PTLD (2 nodal, 1 adenoidal, and 1 cutaneous) and compares the findings with extramedullary involvement by plasma cell neoplasms arising in immunocompetent patients. Plasmacytoma-like PTLDs characteristically arise late after transplantation (mean, 7.0 years), show a variable association with Epstein-Barr virus (2/4 cases positive), and demonstrate histologic and phenotypic findings that overlap with immunocompetent extramedullary plasma cell neoplasms. None of the patients with plasmacytoma-like PTLD developed lytic bone lesions, and 3 of 4 patients had complete responses (>2 years) to reduction of immunosuppression, confirming the role of immunosuppression in the pathogenesis of these lesions. This report, which represents the first case series of plasmacytoma-like PTLD, clarifies the features of this rare subtype of PTLD.
authors.affiliation: Department of Clinical Pathology, Cleveland Clinic,Cleveland, OH 44195, USA.
authors.forename: Bill G
authors.initials: BG
authors.lastname: Richendollar
authors.forename: Eric D
authors.initials: ED
authors.lastname: Hsi
authors.forename: James R
authors.initials: JR
authors.lastname: Cook
mesh_terms: D000293:Adolescent; D000328:Adult; D016027:Heart Transplantation / Q000009:adverse effects*; D004854:Herpesvirus 4, Human / Q000276:immunology; D006801:Humans; D007165:Immunosuppression Therapy / Q000009:adverse effects*; D016030:Kidney Transplantation / Q000009:adverse effects*; D016031:Liver Transplantation / Q000009:adverse effects*; D008297:Male; D008875:Middle Aged; D009196:Myeloproliferative Disorders / Q000209:etiology* / Q000276:immunology / Q000473:pathology; D010954:Plasmacytoma / Q000209:etiology* / Q000276:immunology