Electrodiagnostic method for morton neuroma

NewsBot · May 11, 2013

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A simple electrodiagnostic method for morton neuroma
Elif Ilgaz Aydinlar et al
Muscle & Nerve (in press)

Introduction: We describe a simple and quickly applied electrodiagnostic method for confirming the diagnosis of interdigital neuropathy (IDN) caused by Morton neuroma (MN).

Methods: Interdigital nerves II-III and III-IV were stimulated with surface electrodes simultaneously touching the lateral side of 1 toe and the medial side of the other. Recording was also made with surface electrodes. The results of 20 normal controls and 14 patients with MN were evaluated.

Results: The amplitude and peak latency values elicited in the patients as well as the interside differences revealed an acceptable abnormality rate between 57.1% and 71.4%.

Conclusion: Although the most popular and effective method of MN diagnosis is clinical evaluation supported by imaging, electrophysiological studies can, in selected patients, provide valuable information
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Admin2 · May 12, 2013

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NewsBot · Jan 25, 2014

Contribution of a new electrophysiologic test to Morton's neuroma diagnosis
José Manuel Pardal-Fernández, Elena Palazón-García, Francisco Hernández-Fernández, Carlos de Cabo
Foot and Ankle Surgery; Available online 20 January 2014

Background
Morton's neuroma causes metatarsalgia due to the interdigital neuropathy. The small nerve diameter compromises their evaluation in image studies. To overcome this problem we propose a new electrophysiological test.
Methods
We conducted a prospective case-control study performing a orthodromic electroneurography using subdermal electrodes in controls and patients to assess the validity. Additionally all patients were tested with magnetic resonance. Some patients required surgery and subsequent histological evaluation.
Results
The new ENG procedure showed higher sensitivity and specificity. Methodological standardization was easy and the test was well tolerated by the subjects.
Conclusions
Our test demonstrated remarkable diagnostic efficiency, and also was able to identify symptomatic patients undetected by magnetic resonance, which underlines the lack of correlation between the size and intensity of the lesion. This new electrophysiological method appears to be a highly sensitivity, well-tolerated, simple and low-cost for Mortońs neuroma diagnosis.
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