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  • Title: Nerve size correlates with clinical severity in Charcot-Marie-Tooth disease 1A.
    Author: Zanette G, Tamburin S, Taioli F, Lauriola MF, Badari A, Ferrarini M, Cavallaro T, Fabrizi GM.
    Journal: Muscle Nerve; 2019 Dec; 60(6):744-748. PubMed ID: 31469427.
    Abstract:
    INTRODUCTION: Nerve cross-sectional area (CSA) is larger than normal in Charcot-Marie-Tooth disease 1A (CMT1A), although to a variable extent. We explored whether CSA is correlated with CMT clinical severity measured with neuropathy score version 2 (CMTNS2) and its examination subscore (CMTES2) in CMT1A. METHODS: We assessed 56 patients with CMT1A (42 families). They underwent nerve conduction study (NCS) and nerve high-resolution ultrasound (HRUS) of the left median, ulnar, and fibular nerves. RESULTS: Univariate analysis showed NCS and HRUS variables to be significantly correlated with CMTNS2 and CMTES2 and with each other. Multivariate analysis showed that ulnar motor nerve conduction velocity (β: -0.19) and fibular compound muscle action potential amplitude (-1.50) significantly influenced CMTNS2 and that median forearm CSA significantly influenced CMTNS2 (β: 5.29) and CMTES2 (4.28). DISCUSSION: Nerve size is significantly associated with clinical scores in CMT1A, which suggests that it might represent a potential biomarker of CMT damage and progression.
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