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Intra‐ and internerve cross‐sectional area variability: New ultrasound measures
Author(s) -
Padua Luca,
Martinoli Carlo,
Pazzaglia Costanza,
Lucchetta Marta,
Granata Giuseppe,
Erra Carmen,
Briani Chiara
Publication year - 2012
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.23252
Subject(s) - medicine , ultrasound , homogeneous , median nerve , anatomy , radiology , physics , thermodynamics
Nerve involvement in immune‐related neuropathies is non‐homogeneous, and therefore characterization of ultrasound (US) abnormalities is difficult. We developed two measures to quantify US abnormalities in immune‐related neuropathies. Methods: Intranerve cross‐sectional area (CSA) variability for each nerve was calculated as: maximal CSA/minimal CSA. Internerve CSA variability for each patient was calculated as: maximal intranerve CSA variability/minimal intranerve CSA variability. Six patients underwent US evaluation of the median, ulnar, and fibular nerves, and the abnormalities were scored with our newly developed measures. Results: The new measures were applicable to all nerves and patients. The highest degree of intra‐ and internerve CSA variability was observed in multifocal motor neuropathy, consistent with the asymmetric characteristics of this neuropathy. Conclusions: The application of intra‐ and internerve CSA variability measures allows us to quantify the heterogeneity of nerves and nerve segments and identify different US patterns in diverse immune‐related neuropathies. Muscle Nerve, 2012