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01.03.2016 | Scientific Article

Subluxation of the peroneus long tendon in the cuboid tunnel: is it normal or pathologic? An ultrasound and magnetic resonance imaging study

verfasst von: Taylor J. Stone, Zehava S. Rosenberg, Zoraida Restrepo Velez, Gina Ciavarra, Roberto Prost, Jenny T. Bencardino

Erschienen in: Skeletal Radiology | Ausgabe 3/2016

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Abstract

Objective

To evaluate the position of the peroneus longus (PL) tendon relative to the cuboid tuberosity and cuboid tunnel during ankle dorsiflexion and plantarflexion using ultrasound and MRI.

Materials and methods

The study population included two groups: 20 feet of 10 asymptomatic volunteers who underwent prospective dynamic ultrasound and 55 ankles found through retrospective review of routine ankle MRI examinations. The location of the PL tendon at the cuboid tuberosity and cuboid tunnel was designated as completely within the tunnel, indeterminate, or subluxed with respect to ankle dorsiflexion and plantarflexion.

Results

On dynamic ultrasound, the PL tendon was perched plantar to the cuboid tuberosity in dorsiflexion, and glided to enter the cuboid tunnel distal to the tuberosity in plantarflexion in all 20 feet. On the MRI evaluation, there was a statistically significant difference (p = 0.0006) in the location of the PL tendon between the ankles scanned in dorsiflexion and plantarflexion.

Conclusion

Based on our findings on ultrasound and MRI, the PL tendon can glide in and out of the cuboid tunnel along the cuboid tuberosity depending on ankle position. Thus, “subluxation” of the tendon as it curves to enter the cuboid tunnel, which to the best of our knowledge has not yet been described, should be recognized as a normal, position-dependent phenomenon and not be reported as pathology.

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Titel: Subluxation of the peroneus long tendon in the cuboid tunnel: is it normal or pathologic? An ultrasound and magnetic resonance imaging study
verfasst von: Taylor J. Stone
Zehava S. Rosenberg
Zoraida Restrepo Velez
Gina Ciavarra
Roberto Prost
Jenny T. Bencardino
Publikationsdatum: 01.03.2016
Verlag: Springer Berlin Heidelberg
Erschienen in: Skeletal Radiology / Ausgabe 3/2016
Print ISSN: 0364-2348
Elektronische ISSN: 1432-2161
DOI: https://doi.org/10.1007/s00256-015-2293-3

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Subluxation of the peroneus long tendon in the cuboid tunnel: is it normal or pathologic? An ultrasound and magnetic resonance imaging study