What are the possible causes in the differential diagnosis of torticollis?

Differential Diagnosis of Torticollis

Torticollis is a symptom requiring systematic categorization by age, onset timing, and presence of red-flag features to identify potentially life-threatening causes before considering benign etiologies.

Classification Framework

Torticollis should be classified along two primary axes to guide differential diagnosis 1, 2:

By Age and Onset

• Congenital (present at birth or shortly after) versus acquired (developing in previously normal children) 3, 4
• Painful versus non-painful presentations 3
• Nonparoxysmal (static/nondynamic) versus paroxysmal (dynamic/intermittent) 2

By Urgency: Red-Flag Conditions Requiring Immediate Evaluation

Before considering benign causes, actively exclude these emergent etiologies 5:

Infectious/Inflammatory Causes

• Fever with torticollis strongly predicts severe outcomes requiring hospitalization and should trigger immediate escalation 5
• Meningitis, retropharyngeal abscess, or deep neck space infections 5, 6
• Grisel's syndrome (atlantoaxial rotatory displacement from oropharyngeal inflammation) 6
• Pyogenic cervical spondylitis 6
• Elevated inflammatory markers (WBC, ESR, CRP) mandate urgent workup 5

Neurological Emergencies

• Spinal cord injury, myelopathy, or focal neurological deficits require immediate imaging and specialist referral 5
• Posterior fossa tumors (often present with intermittent torticollis, headaches, vomiting) 4, 6
• Pontine glioma 4
• Altered mental status accompanying torticollis signals urgent pathology 5
• Acute disseminated encephalomyelitis 4
• Neural axis abnormalities 6

Vascular Causes

• Arterial dissection or venous thrombosis demands immediate vascular imaging 5
• Aneurysm (e.g., anterior communicating artery) 4
• Coagulopathy raises concern for hemorrhagic complications (e.g., spontaneous spinal epidural hematoma in hemophiliacs) 5, 4

Trauma-Related

• Recent trauma history increases cervical fracture risk and requires emergent radiographic assessment 5
• Atlantoaxial rotatory displacement from trauma 6

Neoplastic

• Constitutional symptoms (fever, unexplained weight loss) or known cancer history warrant prompt imaging 5
• Cervical osteoblastoma 4
• Benign and malignant spinal neoplasms 6

Other Urgent Causes

• Inflammatory arthritis triggers immediate MRI and specialist consultation 5
• Immunosuppression or IV drug use markedly increase infection likelihood 5

Common Benign Causes by Age

In Infants (Most Common)

Congenital Muscular Torticollis (CMT)

• Most common etiology in infants with incidence of 0.3-1.9% 3, 7
• Caused by sternocleidomastoid muscle contracture/fibrosis 2, 6
• Head tilts toward affected side with chin rotated to opposite side 2
• More common in males (54%) and firstborn children (76%) 8
• Left-sided torticollis more common after vaginal delivery 8
• May coexist with hip dysplasia 8
• Ultrasound reveals characteristic SCM fibrosis or post-traumatic changes 9, 8

Osseous/Skeletal Anomalies

• Klippel-Feil syndrome is the main differential diagnosis of CMT 3
• Congenital anomalies of occipital condyles and upper cervical spine 6
• Hemivertebrae and cervical vertebral fusion 9
• Must be ruled out before surgical SCM release 6

Ocular Torticollis

• Caused by eye muscle weakness requiring compensatory head positioning 6

Sandifer Syndrome

• Results from gastroesophageal reflux 6

Benign Paroxysmal Torticollis of Infancy

• Intermittent, self-limited episodes 2, 6

In Older Children and Adolescents

Atlantoaxial Rotatory Displacement

• Most frequent cause in older children 6
• Results from trauma or oropharyngeal inflammation (Grisel's syndrome) 6

Cervical Dystonia (Spasmodic Torticollis)

• Rare in children but may occur in older adolescents 6
• Paroxysmal/dynamic presentation 2

Drug-Induced

• Dystonic reactions to medications 2

Conversion Disorder/Psychogenic

• Diagnosis of exclusion in appropriate clinical context 4, 2

Increased Intracranial Pressure

• May present with paroxysmal torticollis 2

Diagnostic Approach

The PINCH acronym aids systematic assessment 1:

• Painful vs non-painful
• Infectious signs (fever, elevated inflammatory markers)
• Neurological deficits
• Congenital vs acquired
• History of trauma

Key Clinical Pitfalls

• Never assume CMT without excluding cervical spine anomalies, especially before considering surgical intervention 6, 9
• Acquired torticollis in previously normal children always requires thorough diagnostic clarification as it often has more severe underlying causes 3, 4
• Intermittent torticollis with headaches or vomiting should raise suspicion for posterior fossa pathology 6
• Early diagnosis of neurological causes reduces mortality and morbidity 4

Imaging Recommendations

• Cervical X-ray, CT, or MRI based on clinical suspicion 9
• MRI mandatory when inflammatory arthritis, neurological deficits, or red flags present 5
• Ultrasound for suspected CMT to visualize SCM changes 9, 8