Perform comprehensive physical and neurological examination. Obtain preoperative cervical spine imaging to rule out bony abnormalities. Ensure patient is NPO for at least 8 hours. Perform standard blood work including CBC and coagulation profile. Obtain informed consent. Administer prophylactic intravenous antibiotics within 60 minutes of the incision. Ensure availability of blood products.
Monitor vital signs and neurovascular status of the neck and upper extremities post-operatively. Manage pain with intravenous analgesics. Maintain the head in a neutral or slightly overcorrected position using a cervical collar or foam brace. Initiate physical therapy for passive range-of-motion exercises on the first post-operative day. Monitor wound site for hematoma or infection. Discharge instructions include proper neck positioning, activity restrictions for 4-6 weeks, and strict follow-up for physical therapy assessment.
Comprehensive Clinical Guide: Torticollis Release (Sternocleidomastoid Myotomy)
1. Introduction and Overview
Torticollis, derived from the Latin tortus (twisted) and collum (neck), is a clinical condition characterized by a persistent rotation, tilt, or flexion of the head. When conservative management—including physical therapy, orthotic bracing, and pharmacological intervention—fails to achieve neutral cervical alignment, surgical intervention becomes necessary. The gold standard for refractory muscular torticollis is the Sternocleidomastoid (SCM) Myotomy.
This procedure involves the surgical release or lengthening of the SCM muscle, which is the primary culprit in congenital muscular torticollis (CMT). By releasing the fibrous bands or the contracted muscle belly, the surgeon restores range of motion (ROM) to the cervical spine, preventing secondary craniofacial deformities and cervical spine scoliosis. This guide serves as an authoritative clinical resource for orthopedic surgeons, physical therapists, and clinical support staff.
2. Deep-Dive: Technical Specifications and Mechanisms
The SCM muscle is a complex, two-headed structure originating from the sternum and the clavicle and inserting into the mastoid process of the temporal bone. In cases of chronic torticollis, the muscle undergoes fibrous transformation, losing its elasticity and shortening significantly.
Anatomical Mechanisms of Release
The myotomy aims to address the restricted muscle fibers while protecting the vital neurovascular structures of the neck, specifically the spinal accessory nerve (CN XI), the carotid sheath, and the external jugular vein.
- Bipolar Release: Often performed in severe cases, this involves releasing both the sternal and clavicular heads at their origins and, if necessary, the mastoid insertion.
- Z-Plasty Lengthening: A technique used to increase the functional length of the muscle while maintaining some continuity, though simple myotomy is more common in pediatric populations.
- Endoscopic-Assisted Myotomy: A modern, minimally invasive approach that utilizes a small incision in the supraclavicular or retroauricular region to minimize scarring.
3. Extensive Clinical Indications and Usage
Surgical intervention is rarely the first line of defense. The clinical decision-making process follows a strict protocol.
Clinical Indications
| Indication | Description |
|---|---|
| Refractory CMT | Lack of progress after 6–12 months of intensive physical therapy. |
| Significant ROM Deficit | Persistent limitation of cervical rotation (>15 degrees difference). |
| Craniofacial Asymmetry | Progressive plagiocephaly or facial asymmetry linked to head tilt. |
| Advanced Age at Presentation | Patients presenting after 1 year of age often require surgery due to established fibrosis. |
| Severe Neck Tilt | Persistent head tilt exceeding 15 degrees that interferes with visual tracking/social development. |
Patient Pre-Op Preparation
- Imaging: Cervical spine radiographs to rule out congenital bony anomalies (e.g., Klippel-Feil syndrome).
- Ophthalmological Clearance: To exclude ocular torticollis (e.g., trochlear nerve palsy).
- Physical Therapy Baseline: Documented measurements of cervical passive rotation and lateral flexion.
- Anesthesia Consultation: Evaluation for pediatric airway management, as the procedure is typically performed under general anesthesia.
4. The Surgical Procedure: Step-by-Step
The following represents the standard surgical workflow for an open SCM myotomy.
Phase I: Positioning and Exposure
The patient is placed in a supine position with the neck slightly extended using a shoulder roll. The head is turned toward the contralateral side to bring the contracted SCM into prominence.
Phase II: The Incision
A transverse incision is made 1–2 cm above the clavicle (supraclavicular approach). This allows access to both the sternal and clavicular heads of the SCM.
Phase III: The Release (Myotomy)
- Dissection: Careful dissection through the platysma to identify the SCM.
- Identification of Landmarks: The deep cervical fascia is incised. The carotid sheath is identified and protected.
- Division: The sternal and clavicular heads are identified and transected. Surgeons must be vigilant for the spinal accessory nerve, which typically exits from behind the mid-portion of the SCM.
- Verification: The surgeon confirms the release of all fibrous bands. Passive range of motion is checked intraoperatively to ensure the head can be rotated fully to the affected side.
Phase IV: Closure
The wound is closed in layers to minimize scar hypertrophy, often using a subcuticular absorbable suture. A drain may be placed if significant undermining was required.
5. Post-Op Recovery Protocol
Recovery is as critical as the surgery itself. Without rigorous post-operative physical therapy, the muscle may re-fibrose.
- Days 0–3: Pain management and monitoring of surgical site. A soft neck collar is often utilized for comfort.
- Weeks 1–2: Initiation of passive stretching exercises. The focus is on maintaining the gains achieved during surgery.
- Weeks 2–8: Transition to active-assisted range of motion. Encouraging the child to look toward the previously restricted side using toys or visual stimuli.
- Months 3–6: Long-term follow-up to monitor for recurrence of contracture and to ensure symmetrical development of cervical musculature.
6. Potential Complications
While generally safe, the procedure carries risks inherent to neck surgery.
| Complication | Mitigation Strategy |
|---|---|
| Spinal Accessory Nerve Injury | Meticulous dissection and visualization of the nerve prior to division. |
| Scar Hypertrophy | Use of plastic surgery closure techniques and silicone gel sheets. |
| Recurrence | Consistent, long-term post-operative physical therapy. |
| Hematoma | Careful hemostasis and use of a suction drain if necessary. |
| Vascular Injury | Avoidance of deep, blind instrumentation near the carotid sheath. |
7. Alternative Treatments
Before proceeding to surgery, ensure all non-invasive avenues are exhausted:
1. Physical Therapy (PT): The gold standard. Includes passive stretching, active ROM exercises, and positioning strategies.
2. Torticollis Orthoses: Devices like the TOT collar (Tubular Orthosis for Torticollis) provide a mechanical reminder for the child to maintain a neutral head position.
3. Botulinum Toxin (Botox) Injections: Occasionally used to weaken the SCM muscle temporarily, allowing for more effective physical therapy stretching.
4. Manual Therapy: Craniosacral therapy or specialized pediatric massage, though evidence is less robust compared to standard PT.
8. Frequently Asked Questions (FAQ)
1. At what age is surgery typically performed?
Surgery is usually considered after 12 months of age if conservative therapy has failed. However, if the contracture is severe and causing secondary deformities, it may be performed earlier.
2. Is the surgery permanent?
Yes, the myotomy is a permanent release of the contracted muscle fibers. However, rigorous post-operative stretching is required to prevent the muscle from healing in a shortened state.
3. Will there be a visible scar?
The incision is placed in a natural skin crease (supraclavicular). With proper surgical technique and post-op scar management, the resulting scar is usually very faint.
4. How long does the child need to be in the hospital?
Most SCM myotomies are performed as day-case surgeries or require a single overnight stay for observation.
5. Does the muscle grow back?
The muscle does not "grow back" in the sense of regaining its previous contracture. The healing process creates a fibrous bridge, which is why post-op PT is essential to ensure that the bridge forms at the correct length.
6. What is the success rate?
The success rate for SCM myotomy in treating muscular torticollis is very high, typically exceeding 90% in terms of achieving a neutral head position and full ROM.
7. Can torticollis come back after surgery?
Recurrence is rare if the post-operative PT protocol is followed. If it does "return," it is often due to non-compliance with the stretching program or an underlying neurological issue that was misdiagnosed.
8. Will my child need a neck brace after surgery?
Often, a soft cervical collar is provided for comfort during the first week. Long-term bracing is rarely required unless there is a risk of the child returning to a preferred head tilt.
9. What if the surgery doesn't fully fix the tilt?
If a residual tilt remains, the surgeon may evaluate for secondary contractures in the trapezius or other cervical muscles, or investigate underlying orthopedic issues in the cervical spine.
10. Are there risks to the carotid artery?
The carotid artery is located deep to the SCM. By performing the myotomy in the supraclavicular region—where the SCM is superficial—the risk to the carotid sheath is significantly minimized.
9. Conclusion
The Sternocleidomastoid Myotomy remains a highly effective, safe, and definitive treatment for refractory muscular torticollis. By addressing the anatomical limitation directly, surgeons can prevent long-term musculoskeletal and aesthetic complications. Success relies heavily on a multi-disciplinary approach, integrating expert surgical technique with a dedicated, long-term post-operative physical therapy regimen. Clinicians should approach each case with a thorough diagnostic workup, ensuring that the patient is a suitable candidate and that all conservative measures have been exhausted.