title: Tear of the peroneus longus tendon: MR imaging features in nine patients.
abstract: OBJECTIVE
  To determine the magnetic resonance (MR) imaging features that characterize tear of the peroneus longus tendon at the midfoot.
  
  
  METHODS
  Medical records and MR images in nine patients with a tear of the middle segment of the peroneus longus tendon were retrospectively reviewed. All nine patients had undergone routine ankle MR imaging; three had undergone additional oblique coronal MR imaging. Surgical proof of a tear was available for three patients.
  
  
  RESULTS
  Partial tear was present in four patients, and complete tear was present in five. Partial tears were characterized by heterogeneous signal intensity and thickening of the tendon. Complete tears were characterized by discontinuity of the tendon. Additional findings included fluid in the tendon sheath (n = 6), marrow edema of the lateral calcaneal wall (n = 3), enlarged peroneal tubercle (n = 3), and tear of the peroneus brevis tendon (n = 2). The extent of the tear was better assessed with oblique coronal MR images.
  
  
  CONCLUSIONS
  The characteristic MR imaging appearance of complete or partial tear of the middle portion of the peroneus longus tendon includes foci of increased signal intensity in the distal tendon, morphologic alterations, and/or discontinuity of tendon. Bone marrow edema along the lateral calcaneal wall may be suggestive of the diagnosis. Additional oblique coronal midfoot MR images may help in assessment of the extent of the tear.
authors.affiliation: Department of Radiology, Charite, Virchow Hospital Campus, Humboldt University of Berlin, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Rademaker
authors.forename: Z S
authors.initials: ZS
authors.lastname: Rosenberg
authors.forename: E M
authors.initials: EM
authors.lastname: Delfaut
authors.forename: Y Y
authors.initials: YY
authors.lastname: Cheung
authors.forename: M E
authors.initials: ME
authors.lastname: Schweitzer
mesh_terms: D000328:Adult; D005260:Female; D018409:Foot Injuries / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012421:Rupture; D012680:Sensitivity and Specificity; D013708:Tendon Injuries / Q000175:diagnosis*; D013710:Tendons / Q000473:pathology