Muscle ultrasound in children: normal values and application to neuromuscular disorders.
In this study, 105 healthy children (45 to 156 months old, 57 girls) were examined using ultrasound (US) imaging to obtain reference values of muscle dimensional and aspect parameters. We measured biceps and quadriceps sizes and subcutaneous tissue thickness. To quantify muscle aspect, we calculated muscle density, inhomogeneity and white-area index by digital image analysis. Age-, weight- and gender-dependencies were discussed. We demonstrated earlier that the complete set of parameters allows for differentiation between myopathies and neuropathies in adults, with high sensitivity. In this study, we investigated if these parameters have additional value in the diagnostic evaluation of 36 children with proven neuromuscular disease (20 Duchenne muscular dystrophy, 16 neuropathies). We found that density analysis provides a sensitive method for distinguishing between healthy children and children with neuromuscular disorders. We have also found that more detailed aspect analysis is necessary to further distinguish between these types of neuromuscular disorders in children. In conclusion, this set of normal muscle parameters can be used to help diagnose neuromuscular disorders in children. It will also facilitate follow-up in disease progression and therapy.
Groningen University Hospital, Department of Neurology, Groningen, The Netherlands. n.m.maurits@neuro.azg.nl
Natalia Maria
NM
Maurits
Ernesto Alexander Christiaan
EA
Beenakker
David Eric Christiaan
DE
van Schaik
Johanna Maria
JM
Fock
Johannes Harmen
JH
van der Hoeven
D000293:Adolescent; D001132:Arm / Q000000981:diagnostic imaging; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D018482:Muscle, Skeletal / Q000000981:diagnostic imaging*; D009468:Neuromuscular Diseases / Q000000981:diagnostic imaging*; D011237:Predictive Value of Tests; D012016:Reference Values; D013848:Thigh / Q000000981:diagnostic imaging; D014463:Ultrasonography