title: Clinical Usefulness of Sonoelastography in Infants With Congenital Muscular Torticollis.
abstract: OBJECTIVE
  To evaluate the clinical usefulness of sonoelastography in infants with congenital muscular torticollis (CMT).
  
  
  METHODS
  The medical records of 215 infants clinically diagnosed with CMT were retrospectively reviewed. Fifty-three infants met the inclusion criteria as follows: 1) infants diagnosed as CMT with a palpable neck mass before 3 months of age, 2) infants who were evaluated initially by both B-mode ultrasonography and sonoelastography, and 3) infants who had received physical therapy after being diagnosed with CMT. We checked the thickness of the sternocleidomastoid (SCM) muscles in B-mode ultrasonography, strain ratio of the SCM muscles in sonoelastography, and treatment duration. We evaluated the correlation between the treatment duration and the following factors: SCM muscle thickness, ratio of SCM muscle thickness on the affected to unaffected side (A/U ratio), and strain ratio.
  
  
  RESULTS
  Both the thickness of the affected SCM muscle and the A/U ratio did not show significant correlation with the treatment duration (p=0.66, p=0.90). The strain ratio of the affected SCM muscle was significantly greater than that of the unaffected SCM muscle (p<0.001), and the strain ratio showed significant correlation with the treatment duration (p=0.001).
  
  
  CONCLUSIONS
  Sonoelastography may be a useful adjunctive tool to B-mode ultrasonography for evaluating infants with CMT, especially when predicting their rehabilitation outcomes.
authors.affiliation: Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Seong Kyung
authors.initials: SK
authors.lastname: Hong
authors.affiliation: Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Jin Won
authors.initials: JW
authors.lastname: Song
authors.affiliation: Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Seung Beom
authors.initials: SB
authors.lastname: Woo
authors.affiliation: Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Jong Min
authors.initials: JM
authors.lastname: Kim
authors.affiliation: Department of Radiology, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Tae Eun
authors.initials: TE
authors.lastname: Kim
authors.affiliation: Department of Rehabilitation Medicine, Daegu Fatima Hospital, Daegu, Korea.
authors.forename: Zee Ihn
authors.initials: ZI
authors.lastname: Lee
keywords: Congenital muscular torticollis; Prognosis; Sonoelastography