J Korean Soc Radiol.  2020 Jan;81(1):176-189. 10.3348/jksr.2020.81.1.176.

Clinical Efficacy of Real-Time Sonoelastography for the Follow-Up of Congenital Sternocleidomastoid Muscle Torticollis

Affiliations
  • 1Department of Radiology, Pusan National University Hospital, Biomedical Research Institute, Busan, Korea. lis@pusan.ac.kr
  • 2Department of Radiology, Pusan National University School of Medicine, Busan, Korea.
  • 3Department of Rehabilitation, Pusan National University Hospital, Biomedical Research Institute, Busan, Korea.
  • 4Department of Radiology, Kosin University Gospel Hospital, Busan, Korea.
  • 5Department of Radiology, Inje University Haeundae Paik Hospital, Busan, Korea.
  • 6Department of Radiology, Gyeongsang National University Changwon Hospital, Changwon, Korea.

Abstract

PURPOSE
To evaluate the clinical efficacy of real-time sonoelastography (RTS) for the follow-up of congenital muscular torticollis, based on measurements of muscle elasticity.
MATERIALS AND METHODS
Thirty-four infants (23 male, 11 female) with congenital sternocleidomastoid (SCM) muscle torticollis underwent ultrasonography and elastography between November 2012 and December 2014. We evaluated the thickness, morphology (mass-like, fusiform, or overall thickened shape), and echogenicity of the SCM muscle on grayscale images and color patterns (homogeneous blue, mixed green < 50% and ≥ 50%, and green to red) on elastography. Strain ratios were measured using Q-lab software. A clinician classified the degree of neck rotation and side flexion deficits using a 5-point grade system based on angles of neck rotation and side flexion. Correlations between the ultrasonography and clinical findings were evaluated by statistical analysis.
RESULTS
Twenty-two infants had right and 12 had left SCM torticollis, respectively. Linear regression analysis showed that involved/contralateral SCM thickness differences, morphology, elasticity color scores, and strain ratios of the affected SCM muscles were significantly correlated with neck rotation and side flexion deficit scores (p < 0.05). The elasticity color score of the affected SCM muscle was the most significant factor.
CONCLUSION
RTS might provide a reliable means for evaluating and monitoring congenital muscular torticollis.


MeSH Terms

Elasticity
Elasticity Imaging Techniques*
Follow-Up Studies*
Humans
Infant
Linear Models
Male
Muscles
Neck
Torticollis*
Treatment Outcome*
Ultrasonography
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