title: B Cell Lymphoma mimicking Rheumatoid Arthritis.
abstract: Non Hodking´s lymphoma (NHL) may involve bones but synovial involvement is uncommon. We describe a patient who presented with polyarthritis, sicca symptoms and rash suggestive of rheumatoid arthritis. An atypical skin rash prompted skin and synovial biopsies. A diagnosis of synovial and skin malignant large B-cell lymphoma anaplastic subtype was performed. Chemotherapy with dexamethasone, vincristine and rituximab was started. Following treatment the patient had complete resolution of cutaneous and articular lymphoma manifestations.
authors.affiliation: Section of Rheumatology and Immunology.
authors.forename: M A
authors.initials: MA
authors.lastname: Cosatti
authors.affiliation: Section of Rheumatology and Immunology.
authors.forename: C N
authors.initials: CN
authors.lastname: Pisoni
authors.affiliation: Hematology Department.
authors.forename: J L
authors.initials: JL
authors.lastname: Altuve
authors.affiliation: Pathology Department, Centro de Educación Médica e Investigaciones Clínicas (CEMIC), Buenos Aires, Argentina.
authors.forename: C
authors.initials: C
authors.lastname: Lorente
mesh_terms: D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D003907:Dexamethasone / Q000627:therapeutic use; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D016393:Lymphoma, B-Cell / Q000175:diagnosis* / Q000188:drug therapy; D000069283:Rituximab / Q000627:therapeutic use; D014750:Vincristine / Q000627:therapeutic use
chemical_list: D000069283:Rituximab; D014750:Vincristine; D003907:Dexamethasone