title: Adjacent tissue involvement of acute inflammatory ankle arthritis on magnetic resonance imaging findings.
abstract: OBJECTIVE
  The ankle joint and surrounding subtalar joint have several tendons in close proximity. This study was performed to investigate the concurrent adjacent tissue involvement on MRI findings when the surgical treatment is considered for an acute inflammatory arthritis of the ankle joint.
  
  
  METHODS
  Consecutive patients with acute inflammatory ankle arthritis who visited the emergency room and underwent MRI were included. After interobserver reliability testing of MRI findings, adjacent tissue involvement in the acute inflammatory ankle arthritis were evaluated including flexor hallucis longus (FHL), flexor digitorum longus (FDL), tibialis posterior (TP), peroneus longus (PL), peroneus brevis (PB), extensor digitorum longus (EDL), tibialis anterior (Tib Ant), extensor hallucis longus (EHL), subtalar joint, talus, tibia, and calcaneus.
  
  
  RESULTS
  Twenty-five patients (mean age 57.8 years; 16 males and nine females) were included. Of the 25 patients, 23 showed FHL involvement, 21 FDL, 21 TP, 15 PL, 15 PB, three EDL, 21 subtalar joint, six talus, six tibia, and five calcaneus on MR images. No Tib Ant or EHL involvement was observed on MR findings in acute inflammatory ankle arthritis.
  
  
  CONCLUSIONS
  Patients with acute inflammatory ankle arthritis showed frequent concomitant surrounding tissue involvement on MRI, which included FHL, FDL, TP, and subtalar joint. This needs to be considered when surgical drainage is planned for acute inflammatory ankle arthritis.
authors.affiliation: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, 300 Gumi-Dong, Bundang-Gu, Sungnam, Kyungki, 463-707, Korea.
authors.forename: Kyoung Min
authors.initials: KM
authors.lastname: Lee
authors.forename: Chin Youb
authors.initials: CY
authors.lastname: Chung
authors.forename: Sung Hun
authors.initials: SH
authors.lastname: Won
authors.forename: Seung Yeol
authors.initials: SY
authors.lastname: Lee
authors.forename: Young
authors.initials: Y
authors.lastname: Choi
authors.forename: Moon Seok
authors.initials: MS
authors.lastname: Park
mesh_terms: D000208:Acute Disease; D000328:Adult; D000368:Aged; D000843:Ankle Joint / Q000473:pathology*; D001168:Arthritis / Q000473:pathology*; D004322:Drainage; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000473:pathology*; D015588:Observer Variation; D019637:Orthopedic Procedures; D015203:Reproducibility of Results; D012189:Retrospective Studies; D013710:Tendons / Q000473:pathology*