title: Rheumatoid arthritis presenting as an invasive soft-tissue tumour.
abstract: BACKGROUND
  We present two patients with advanced rheumatoid arthritis (RA) who were diagnosed as having malignant soft-tissue tumours on magnetic resonance scanning. They were tertiary referrals to a unit specialising in the management of soft-tissue sarcoma.
  
  
  CONCLUSIONS
  Both of these tumours subsequently turned out to be benign complications of RA. In both of these cases, no mention was made on the initial radiological request form of the presence of RA. It is essential to give an adequate past medical history when requesting any radiological investigation.
authors.affiliation: Department of Orthopaedic Surgery, Manchester Royal Infirmary, Oxford Road, Manchester, M13 9WL, UK. matt.moran@ukgateway.net
authors.forename: M
authors.initials: M
authors.lastname: Moran
authors.forename: C
authors.initials: C
authors.lastname: Fang
authors.forename: A
authors.initials: A
authors.lastname: Paul
mesh_terms: D001172:Arthritis, Rheumatoid / Q000175:diagnosis*; D005260:Female; D006365:Heel / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012782:Shoulder / Q000473:pathology; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*