Abstract
Objective
To propose new sonographic criteria for the diagnosis of idiopathic tarsal tunnel
syndrome (TTS).
Design
Prospective case-control study.
Setting
Academic referral center.
Participants
Adult healthy volunteers (n=17) and adult patients (n=14) with electrodiagnostically
proven idiopathic TTS (mean age, 43.4±8.7y; height, 161.4±7.0cm; weight, 90.6±13.9kg)
(N=31). The exclusion criteria were patients with diabetes, neurological disorders,
associated ankle and/or foot disorders, electrodiagnostic evidence of a widespread
lesion, or feet that were electrophysiologically negative for TTS or with structural
abnormalities detected via ultrasound imaging.
Interventions
Not applicable.
Main Outcome Measures
Tibial nerve CSA at the proximal tarsal tunnel, tibial nerve CSA within the tunnel,
within tunnel-to-proximal tunnel CSA ratio.
Results
There was a significant difference in the within tunnel CSA and within tunnel-to-proximal
tunnel CSA ratio between the TTS group and controls (P=.002 and P=.001, respectively). The optimum cutoff value was 19mm2 for the within tunnel CSA and 1 for the within tunnel-to-proximal tunnel CSA ratio.
Sensitivities were 61% and 74%, respectively.
Conclusions
The within tunnel-to-proximal tunnel CSA ratio and the within tunnel CSA are the most
accurate sonographic parameters and can be helpful in the assessment of idiopathic
TTS.
Keywords
List of abbreviations:
AUC (area under the curve), BMI (body mass index), CSA (cross-sectional area), EDX (electrodiagnostic), ROC (receiver operating characteristic), TTS (tarsal tunnel syndrome)To read this article in full you will need to make a payment
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Article info
Publication history
Published online: December 16, 2015
Footnotes
Disclosures: none.
Identification
Copyright
© 2016 by the American Congress of Rehabilitation Medicine
