title: An infiltrating rheumatoid nodule?
abstract: The case is presented of a patient with mild rheumatoid arthritis who developed an enlarged painful tissue mass in the left lower leg. Although the history, clinical, and imaging appearances suggested that it was a soft tissue sarcoma, a biopsy specimen showed histological features consistent with either a rheumatoid nodule or subcutaneous granuloma annulare.
authors.affiliation: Rheumatology and Rehabilitation Research Unit, Leeds, United Kingdom.
authors.forename: A H
authors.initials: AH
authors.lastname: Isdale
authors.forename: P S
authors.initials: PS
authors.lastname: Helliwell
mesh_terms: D001172:Arthritis, Rheumatoid / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D005355:Fibrosis; D006801:Humans; D008875:Middle Aged; D012218:Rheumatoid Nodule / Q000175:diagnosis* / Q000473:pathology; D012509:Sarcoma / Q000175:diagnosis* / Q000473:pathology; D012983:Soft Tissue Neoplasms / Q000175:diagnosis* / Q000473:pathology