title: MR imaging features of foot involvement in patients with psoriasis.
abstract: OBJECTIVE
  To determine alterations of the soft tissues, tendons, cartilage, joint spaces, and bones of the foot using magnetic resonance (MR) imaging in patients with psoriasis.
  
  
  METHODS
  Clinical and MR examination of the foot was performed in 26 consecutive patients (52 ft) with psoriasis. As a control group, 10 healthy volunteers (20 ft) were also studied. Joint effusion/synovitis, retrocalcaneal bursitis, retroachilles bursitis, Achilles tendonitis, soft-tissue edema, para-articular enthesophytes, bone marrow edema, sinus tarsi syndrome, enthesopathy at the Achilles attachment and at the plantar fascia attachment, plantar fasciitis, tenosynovitis, subchondral cysts, and bone erosions, joint space narrowing, subchondral signal changes, osteolysis, luxation, and sub-luxation were examined.
  
  
  RESULTS
  Clinical signs and symptoms (pain and swelling) due to foot involvement were present in none of the patients while frequency of involvement was 92% (24/26) by MR imaging. The most common MR imaging findings were Achilles tendonitis (acute and peritendinitis) (57%), retrocalcaneal bursitis (50%), joint effusion/synovitis (46%), soft-tissue edema (46%), and para-articular enthesophytes (38%). The most commonly involved anatomical region was the hindfoot (73%).
  
  
  CONCLUSIONS
  Our data showed that the incidence of foot involvement was very high in asymptomatic patients with psoriasis on MR imaging. Further MR studies are needed to confirm these data. We conclude that MR imaging may be of importance especially in early diagnosis and treatment of inflammatory changes in the foot.
authors.affiliation: Department of Radiology, Zonguldak Karaelmas University, School of Medicine, Zonguldak, Turkey. sunarerdem@yahoo.com
authors.forename: C Zuhal
authors.initials: CZ
authors.lastname: Erdem
authors.forename: Nilgun Solak
authors.initials: NS
authors.lastname: Tekin
authors.forename: Selda
authors.initials: S
authors.lastname: Sarikaya
authors.forename: L Oktay
authors.initials: LO
authors.lastname: Erdem
authors.forename: Sezen
authors.initials: S
authors.lastname: Gulec
mesh_terms: D000328:Adult; D015535:Arthritis, Psoriatic / Q000175:diagnosis*; D005260:Female; D005528:Foot / Q000473:pathology*; D005534:Foot Diseases / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D055815:Young Adult