Evidence of nerve hypertrophy in patients with inclusion body myositis on lower limb MRI.

Autor: Elmansy M; Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, London, UK.; Department of Radiology, Mansoura University Hospitals, Mansoura, Egypt., Morrow JM; Queen Square Centre for Neuromuscular Diseases, Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK., Shah S; Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, London, UK., Fischmann A; Institute of Radiology and Nuclear Medicine and Breast Center St. Anna, Hirslanden Klinik St. Anna, Lucerne, Switzerland., Wastling S; Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, London, UK., Reilly MM; Queen Square Centre for Neuromuscular Diseases, Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK., Hanna MG; Queen Square Centre for Neuromuscular Diseases, Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK., Helmy EM; Department of Radiology, Mansoura University Hospitals, Mansoura, Egypt., El-Essawy SS; Department of Radiology, Mansoura University Hospitals, Mansoura, Egypt., Thornton JS; Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, London, UK.; Queen Square Centre for Neuromuscular Diseases, Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK., Yousry TA; Neuroradiological Academic Unit, UCL Queen Square Institute of Neurology, London, UK.; Queen Square Centre for Neuromuscular Diseases, Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, London, UK.
Jazyk: angličtina
Zdroj: Muscle & nerve [Muscle Nerve] 2022 Dec; Vol. 66 (6), pp. 744-749. Date of Electronic Publication: 2022 Oct 07.
DOI: 10.1002/mus.27728
Abstrakt: Introduction/aims: Inclusion body myositis (IBM) is a myopathic condition but in some patients has been associated with an axonal length-dependent polyneuropathy. In this study, we quantified the cross-sectional area of the sciatic and tibial nerves in patients with IBM comparing with Charcot-Marie-Tooth disease type 1A (CMT1A) and healthy controls using magnetic resonance neurography (MRN).
Methods: MRN of the sciatic and tibial nerves was performed at 3T using MPRAGE and Dixon acquisitions. Nerve cross-sectional area (CSA) was measured at the mid-thigh and upper third calf regions by an observer blinded to the diagnosis. Correlations were performed between these measurements and clinical data.
Results: A total of 20 patients with IBM, 20 CMT1A and 29 healthy controls (age- and sex-matched) were studied. Sciatic nerve CSA was significantly enlarged in patients with IBM and CMT1A compared to controls (sciatic nerve mean CSA 62.3 ± 22.9 mm 2 (IBM) vs. 35.5 ± 9.9 mm 2 (controls), p < 0.001; and 96.9 ± 35.5 mm 2 (CMT1A) vs. 35.5 ± 9.9 mm 2 (controls); p < 0.001). Tibial nerve CSA was also enlarged in IBM and CMT1 patients compared to controls.
Discussion: MRN reveals significant hypertrophy of the sciatic and tibial nerves in patients with IBM and CMT1A compared to controls. Further studies are needed to correlate with neurophysiological measures and assess whether this finding is useful diagnostically.
(© 2022 The Authors. Muscle & Nerve published by Wiley Periodicals LLC.)
Databáze: MEDLINE
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