title: Large benign rheumatoid nodules of the trunk in an elderly patient: radiologic appearance mimicking a soft-tissue sarcoma.
abstract: An 80-year-old woman without any evidence of rheumatoid arthritis presented with two large (maximum diameter: 6 cm and 7 cm), rapidly growing, rubbery nodules on the trunk. Although the clinical and radiological appearance suggested malignancy, the nodules were pathologically identical to rheumatoid nodules in rheumatoid arthritis, and the nodules regressed spontaneously. The final diagnosis was benign rheumatoid nodules. Recognition of this rare clinical entity is important to avoid unnecessary examination and treatment.
authors.affiliation: Department of Orthopaedic Surgery, Yamagata University School of Medicine, 2-2-2 Iida-Nishi, Yamagata, 990-9585, Japan. osanait@med.id.yamagata-u.ac.jp
authors.forename: Toshihisa
authors.initials: T
authors.lastname: Osanai
authors.forename: Takashi
authors.initials: T
authors.lastname: Tsuchiya
authors.forename: Tadashi
authors.initials: T
authors.lastname: Hasegawa
authors.forename: Mitsunori
authors.initials: M
authors.lastname: Yamakawa
mesh_terms: D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D012075:Remission, Spontaneous; D012218:Rheumatoid Nodule / Q000473:pathology*; D012509:Sarcoma / Q000473:pathology*; D035441:Thoracic Wall / Q000473:pathology; D014057:Tomography, X-Ray Computed