title: Epstein-Barr virus-associated B-cell type non-Hodgkin's lymphoma with concurrent p53 protein expression in a rheumatoid arthritis patient treated with methotrexate.
abstract: A Japanese male patient received various medications for his long-standing rheumatoid arthritis (stage IV, class II). He developed a mass on the right anterior chest wall after being treated with methotrexate (MTX) for 4 months. A biopsy of the mass showed it to be Epstein Barr virus (EBV)-associated lymphoma of B-cell phenotype stage IE (bulky mass), with positive EBV-encoded small RNAs (EBERs) in situ hybridization, EBV latent membrane protein-1 (LMP-1) negative, EB nuclear antigen-2 (ERNA-2) negative, CD20/L26 (+), CD45RO/UCHL-1 (-). A single band of the joined termini of the EBV genome was demonstrated in DNA extracted from the mass, suggesting a clonal disorder of the mass. Immunostaining of the mass with p53 antibody was also positive. With discontinuation of MTX and administration of chemotherapy, the tumor disappeared but recurred after 3 months. This case suggests that concordant p53 expression and latent EBV infection may play an important role in the pathogenesis of lymphomas arising in patients with rheumatoid arthritis who are immunosuppressed with MTX.
authors.affiliation: Department of Internal Medicine, Kanazawa Medical University, Ishikawa, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Hirose
authors.forename: Yasufumi
authors.initials: Y
authors.lastname: Masaki
authors.forename: Jun
authors.initials: J
authors.lastname: Okada
authors.forename: Chang Gi
authors.initials: CG
authors.lastname: Kim
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kawabata
authors.forename: Noriyoshi
authors.initials: N
authors.lastname: Ogawa
authors.forename: Yuji
authors.initials: Y
authors.lastname: Wano
authors.forename: Susumu
authors.initials: S
authors.lastname: Sugai
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications* / Q000188:drug therapy / Q000821:virology; D004273:DNA, Neoplasm; D020031:Epstein-Barr Virus Infections / Q000139:chemically induced / Q000150:complications* / Q000235:genetics; D016679:Genome, Viral; D004854:Herpesvirus 4, Human / Q000235:genetics / Q000276:immunology; D006801:Humans; D007166:Immunosuppressive Agents / Q000009:adverse effects*; D016393:Lymphoma, B-Cell / Q000209:etiology / Q000473:pathology / Q000821:virology*; D008297:Male; D008727:Methotrexate / Q000008:administration & dosage / Q000009:adverse effects*; D008875:Middle Aged; D016159:Tumor Suppressor Protein p53 / Q000378:metabolism* / Q000502:physiology
chemical_list: D004273:DNA, Neoplasm; D007166:Immunosuppressive Agents; D016159:Tumor Suppressor Protein p53; D008727:Methotrexate