title: Oral plasmablastic lymphoma in an HIV-negative patient: a case report and review of the literature.
abstract: Plasmablastic lymphoma is an HIV-associated non-Hodgkin's lymphoma that primarily affects the oral cavity and jaws. The purpose of this report is to describe the first case of plasmablastic lymphoma occurring in an HIV-negative, nonimmunocompromised individual, and to review the histopathologic and immunohistochemical phenotype of this lymphoma. Histopathologically, our case exhibited a dense, diffuse lymphocytic infiltrate of noncohesive large lymphocytes with plasmacytoid features. Immunohistochemical analysis revealed positivity for the B-cell marker CD79a, VS38c, Epstein-Barr virus latent membrane protein (LMP), immunoglobulin G (IgG), and lambda light chain restriction. Neoplastic cells were negative for leukocyte common antigen, CD20, CD3, CD10, CD138, Bcl-2, Bcl-6, desmin, actin, EMA, S-100, HMB45, Alk-1, HHV8, IgA, IgM, and cytokeratin. The features of this rare disease are summarized based on a comprehensive review of the epidemiologic, clinical and immunohistochemical findings of previously reported cases.
authors.affiliation: Department of Diagnostic Sciences and Pathology, University of Maryland Dental School, Baltimore, MD 21201, USA. mas003@dental.umaryland.edu
authors.forename: Mark A
authors.initials: MA
authors.lastname: Scheper
authors.forename: Nikolaos G
authors.initials: NG
authors.lastname: Nikitakis
authors.forename: Rui
authors.initials: R
authors.lastname: Fernandes
authors.forename: Christopher D
authors.initials: CD
authors.lastname: Gocke
authors.forename: Robert A
authors.initials: RA
authors.lastname: Ord
authors.forename: John J
authors.initials: JJ
authors.lastname: Sauk
mesh_terms: D018023:HIV Seronegativity; D006801:Humans; D007074:Immunoglobulin G / Q000032:analysis; D007146:Immunoglobulin lambda-Chains / Q000032:analysis; D007150:Immunohistochemistry; D016393:Lymphoma, B-Cell / Q000473:pathology*; D016403:Lymphoma, Large B-Cell, Diffuse / Q000473:pathology*; D008297:Male; D008339:Mandibular Neoplasms / Q000473:pathology*; D008875:Middle Aged; D010950:Plasma Cells; D014763:Viral Matrix Proteins / Q000032:analysis
chemical_list: C037662:EBV-associated membrane antigen, Epstein-Barr virus; D007074:Immunoglobulin G; D007146:Immunoglobulin lambda-Chains; D014763:Viral Matrix Proteins