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Dynamic Chiropractic – April 21, 2003, Vol. 21, Issue 09
Dynamic Chiropractic
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Dynamic Chiropractic

Congenital Muscular Torticollis

By Warren Hammer, MS, DC, DABCO

Congenital muscular torticollis usually presents during infancy with fibrous contracture of a unilateral sternocleidomastoid (SCM) muscle, causing the child's head to tilt to the tightened side. Limited neck motion or a palpable tumor within the muscle often are present.1 During this period, symptoms may resolve spontaneously and/or reappear at any time. An SCM tumor of infancy is a lateral neck mass affecting children between the ages of 2-4 weeks. It may or may not be associated with congenital muscular torticollis. Most of the time, it resolves spontaneously in four to eight months.2 Pseudotumor and congenital muscular torticollis probably represent different manifestations of SCM muscle fibrosis.

Congenital muscular torticollis is not considered a static and fixed deformity, but has far-reaching effects on the craniofacial growth and development of the spine.3 The most common treatment is stretching, with a positive outcome of 90 percent. Surgical treatment is indicated when a patient has undergone at least six months of controlled manual stretching and has residual head tilt; deficits of passive rotation; lateral bending of the neck less than 15 degrees; and a tight muscular band or tumor. Surgery usually is not considered for those under one year of age.4

# of Patients Diagnosis in Patients Presenting With Toricollis as Sole Symptom, or One of Several Symptoms8
30
6
5
4
3
3

1
1
1
1
1
4

congenital torticollis (50 percent)
secondary to space-occupying intracranial lesions (10 percent)
benign paroxystic torticollis (8.3 percent)
posttraumatic
secondary to ocular disorders
Sandifer syndromes (torticollis associated with gastroesophageal reflux)

focal dystonia of the neck
secondary to a submandibular adeno-phlegmon
secondary to an epidural hematoma of the cervical spine
encephalomyelitis
spondylodiscitis
cases unclassified

A consistent relationship between congenital muscular torticollis and dysplasia of the hip is widely accepted. However, the coexistence rate of these two disorders has been reported with variations from 0 percent to 20 percent.5 For this reason, it is important to take radiographs of the hip, especially in a child under one year of age with muscular torticollis.

There are instances of breech delivery and torticollis, although it has been noted that torticollis was not related to delivery method.6 Birth trauma appears to be the main etiological factor in congenital muscular torticollis. A study revealed two findings hitherto unreported: mandibular hypoplasia may be a useful early sign of this condition, and the side affected may depend on the side of shoulder delivered first. More studies, however, are required to confirm these findings.7

Since torticollis is a nonspecific symptom, it may be associated with a variety of conditions. In one study, 4,138 new patients were evaluated.8 In 60 patients, torticollis was either the sole symptom, or one of the symptoms leading to consultation, with a number of different diagnoses established (see chart above).

Atlanto-axial rotatory fixation is a rare cause of childhood torticollis. It may occur spontaneously or may be associated with trauma, upper respiratory tract infection or congenital abnormalities of the cervical spine. Presentation usually involves persistent torticollis and "cock-robin" deformity of the neck. Displacement of the lateral mass of the atlas and the eccentric position of the odontoid peg can be seen in the plain films. A computed tomography (CT) scan excludes fractures and confirms atlanto-axial rotation. The superimposition of CT images demonstrates a way of diagnosing subluxation. MRI offers better soft-tissue differentiation, and allows assessment of the integrity of the transverse ligament.9

Congenital muscular torticollis usually is seen in newborns, infants and children, but may also present in adolescents and young adults. It should be included in the differential diagnosis of cervical dystonia as one of the nondystonic causes of abnormal head posture. A 17-year-old boy presented with a 10-year history of progressive head tilt to the right. Bilateral posterolateral cervical pain was mild, and he was fully functional. The right SCM muscle was prominent without rotation of the head to the left. The SCM had a cord-like consistency on palpation. Magnetic resonance (MR) and CT scan imaging of the neck musculature suggested fibrous tissue within the substance of the muscle. This was confirmed histopathologically when the right SCM was surgically explored and resected. Combined use of MR and CT scan of neck muscles may be of help in the diagnosis.10

A study in JMPT presented a case of congenital muscular torticollis in a 7-month-old male infant with significant head tilt since birth. There was significant spasm of the left SCM and trapezius muscles, a left lateral atlas and suboccipital joint dysfunctions. Excellent results were obtained with chiropractic manipulation; trigger point therapy; specific stretches; pillow positioning; and exercises.11

It appears it may be wise to utilize high-resolution ultrasonography when evaluating a congenital muscular torticollis (CMT) patient. CMT is now considered a dynamic disease in which the pathologic characteristics of affected SCM muscles change with time, rather than remaining a fixed and static deformity. The ultrasound can distinguish the arrangement and composition of the muscle fibers, and there is a correlation between clinical and ultrasonographic features.3 Type I fibrosis showed a localization, and type II (a diffuse type) was shown by a mixture of fibrous tissue and normal muscle fibers in the involved SCM.

Type I and type II fibrosis may represent a transitional state and develop types III and IV, which represent an irreversible state of CMT in which there is severe fibrosis with nearly complete absence of normal muscle tissue. Types III and IV fibrosis initially may contribute to the persistent symptoms up to advanced age and the high incidence of surgical intervention.3 Consequently, it is possible that if the patient is a type I or II, conservative treatment may be adequate, while type IV patients may require a surgical approach.

References

  1. Luther BL. Congenital muscular torticollis. Ortho Nurs 2002 May-June;21(3):21-7.
  2. Sudre-Levillain I, Nicollas R, Roman S, Aladio P, Moukheiber A, Triglia JM. Sternocleidomastoid inflammatory pseudotumors of muscle in children. Arch Pediatr 2000 Nov;7(11): 1180-4.
  3. Simon FT, Tang MD, Kuang-Hung Hsu, et al. Longitudinal followup study of ultrasonography in congenital muscular torticollis. Clin Orth & Rel Res 403:179-85.
  4. Cheng JC, Wong MW, Tang SP, Chen TM, Shum SL, Wong EM. Department of Orthopaedics and Traumatology, The Chinese University of Hong Kong and the Prince of Wales Hospital, Shatin, NT. .
  5. Tien YC, Su JY, Lin GT, Lin SY. Ultrasonographic study of the coexistence of muscular torticollis and dysplasia of the hip. J Pediatr Orthop 2001 May-Jun;21(3):343-7.
  6. Hsieh YY, Tsai FJ, Lin CC, Chang FC, Tsai CH. Breech deformation complex in neonates. J Reprod Med 2000 Nov;45(11):933-5.
  7. Ho BC, Lee EH, Singh K. Epidemiology, presentation and management of congenital muscular torticollis. Singapore Med J 1999 Nov;40(11):675-9.
  8. Loureiro B, Ferrer-Lozano M, Abenia P, Ferraz S, Rebage V, Lopez-Pison J. Torticollis as a cause of consultation in neuropediatrics. Rev Neurol 1999 Sept 16-30;29(6):493-9.
  9. Maheshwaran S, Sgouros S, Jeyapalan K, Chapman S, Chandy J, Flint G. Imaging of childhood torticollis due to atlanto-axial rotatory fixation. Childs Nerv Syst 1995 Dec;11(12):667-71.
  10. Singer C, Green BA, Bruce JH, Bowen BC, Weiner WJ. Late presentation of congenital muscular torticollis: use of MR imaging and CT scan in diagnosis. Mov Disord 1994 Jan;9(1):100-3.
  11. Toto BJ. Chiropractic correction of congenital muscular torticollis. Manipulative Physiol Ther 1993 Oct;16(8):556-9.

Warren Hammer, MS, DC, DABCO
Norwalk, Connecticut



Click here for more information about Warren Hammer, MS, DC, DABCO.

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