Increased fascial thickness of the deltoid muscle in dermatomyositis and polymyositis: An ultrasound study
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SourceMuscle and Nerve, 52, 4, (2015), pp. 534-539
Article / Letter to editor
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Muscle and Nerve
SubjectRadboudumc 18: Healthcare improvement science RIHS: Radboud Institute for Health Sciences; Radboudumc 3: Disorders of movement DCMN: Donders Center for Medical Neuroscience; Radboudumc 5: Inflammatory diseases RIHS: Radboud Institute for Health Sciences
INTRODUCTION: We investigated the use of ultrasound to detect fascial thickening of the deltoid, vastus lateralis (VL), and rectus femoris (RF) muscles in dermatomyositis (DM) and polymyositis (PM). METHODS: Fascial thickness of 7 DM and 5 PM patients was compared with that of healthy controls (n = 54). RESULTS: The deltoid fascial thickness was 2-fold greater in the DM/PM group (1.15 mm vs. 0.54 mm; P < 0.001) compared with healthy controls. Eight patients had markedly thickened deltoid fascia (>5 SD). Only 1 patient with a mild clinical presentation had normal deltoid fascial thickness. Four patients also had fascial thickening of the VL and/or RF. CONCLUSIONS: Deltoid fascial thickness was increased significantly in DM and PM patients, whereas the quadriceps muscle only showed thickened fascia in severely affected patients. This study suggests that a concomitant fasciitis may be present more often than previously believed. Muscle Nerve, 2015 Muscle Nerve 52: 534-539, 2015.
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