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Cervical Spine Fracture (Hangman)
Cardiovascular Presentations
Abdominal aortic aneurysm
Acute coronary syndrome (NSTEMI)
Acute coronary syndrome (STEMI)
Acute decompensated heart failure
Acute limb ischemia
Acute mesenteric ischemia
Aortic dissection
Aortic stenosis
Atrial fibrillation and flutter
Bradyarrhythmia and heart block
Cardiac arrest
Deep vein thrombosis
Myocarditis
Pericarditis
Pulmonary embolism
Stable angina
Superficial thrombophlebitis
Superior vena cava syndrome
Supraventricular tachycardia
Syncope (cardiogenic)
Unstable angina
Ventricular tachycardia
Respiratory Presentations
Acute bronchitis
Acute respiratory failure
Aspiration pneumonia
Asthma exacerbation
Bronchiolitis
Community-acquired pneumonia
COVID-19 pneumonia
COPD exacerbation
Croup
Croup (laryngotracheobronchitis)
Epiglottitis
Hemothorax
Hospital-acquired pneumonia
Pleural effusion
Pneumothorax (traumatic)
Pulmonary contusion
Spontaneous pneumothorax
Neurological Presentations
Bell's palsy
Benign paroxysmal positional vertigo
Brain abscess
Cauda equina syndrome
Cervical radiculopathy
Concussion (mild traumatic brain injury)
Encephalitis
Guillain-Barré syndrome
Hemorrhagic stroke (intracerebral)
Ischemic stroke
Lumbar radiculopathy
Malignant spinal cord compression
Migraine
Peripheral neuropathy (acute)
Retropharyngeal abscess
Schizophrenia (acute exacerbation)
Seizure (breakthrough:known epilepsy)
Seizure (first-time)
Spinal cord injury
Status epilepticus
Subarachnoid hemorrhage
Tension headache
Transient ischemic attack
Traumatic brain injury (moderate-severe)
Vestibular neuritis
Viral meningitis
Gastrointestinal Presentations
Acute appendicitis
Acute cholecystitis
Acute diverticulitis
Acute pancreatitis
Anal fissure
Choledocholithiasis and cholangitis
Clostridioides difficile colitis
Gastritis
Gastroenteritis (viral and bacterial)
Gastroesophageal reflux disease
Incarcerated or strangulated hernia
Inflammatory bowel disease flare
Large bowel obstruction
Lower GI hemorrhage
Peptic ulcer disease
Perforated viscus
Small bowel obstruction
Upper GI hemorrhage
Genitourinary and Reproductive Presentations
Acute prostatitis
Acute urinary retention
Ectopic pregnancy
Epididymitis
Orchitis
Ovarian torsion
Paraphimosis
Pelvic inflammatory disease
Priapism
Pyelonephritis
Renal laceration
Ruptured ovarian cyst
Testicular torsion
Tubo-ovarian abscess
Urinary tract infection (uncomplicated)
Urolithiasis (renal colic)
Vaginal bleeding (non-pregnant)
Infectious Disease Presentations
Acute sinusitis
Acute tonsillitis
Acute upper respiratory infection
Animal bite
Bacterial meningitis
Cellulitis
Conjunctivitis (bacterial)
Dental abscess
Endocarditis
Febrile neutropenia
Fournier gangrene
Hand-foot-mouth disease
Hepatitis (acute)
Herpes zoster
HIV-related illness
Human bite
Impetigo
Infected diabetic foot ulcer
Infectious mononucleosis
Influenza
Necrotizing fasciitis
Osteomyelitis
Otitis externa
Parasitic infection
Periorbital cellulitis
Peritonsillar abscess
Scabies
Sepsis
Septic arthritis
Spontaneous bacterial peritonitis
Tick-borne illness (Lyme disease)
Tinea infection
Tuberculosis
Viral exanthem
Wound infection
Trauma Presentations
Achilles tendon rupture
ACL and mceniscus tear
Ankle fracture
Ankle sprain
Burn
Calcaneus fracture
Cervical spine fracture
Clavicle fracture
Dental avulsion
Distal radius fracture
Drowning
Elbow fracture and dislocation
Electrical injury
Facial bone fracture
Facial laceration
Femur fracture
Fingertip amputation
Forearm fracture (radius and ulna)
Frostbite
Hand:finger laceration
Heat exhaustion
Heat stroke
Hip fracture
Humeral shaft fracture
Knee dislocation
Knee sprain
Lightning injury
Mandible fracture
Metacarpal fracture
Metatarsal fracture
Muscle strain
Nasal fracture
Non-accidental trauma
Orbital fracture
Patella fracture
Phalanx fracture (finger)
Proximal humerus fracture
Pulmonary contusion
Rib fracture
Rotator cuff tear (acute traumatic)
Scalp laceration
Scaphoid fracture
Shoulder dislocation
Skull fracture
Splenic laceration
Sternal fracture
Supracondylar pediatric fracture
Tendon laceration (hand:wrist)
Thoracic and lumbar spine fracture
Tibia:fibula fracture
Tibial plateau fracture
Toe fracture
Traumatic epistaxis
Traumatic hyphema
Toxicologic Presentations
Acetaminophen toxicity
Alcohol intoxication
Alcohol withdrawal
Anticholinergic toxicity
Anticoagulant overdose
Benzodiazepine overdose
Benzodiazepine:sedative overdose
Beta-blocker and calcium channel blocker toxicity
Carbon monoxide poisoning
Caustic ingestion
Digoxin toxicity
Drug eruption
Foreign body ingestion
Opioid intoxication
Opioid overdose
Opioid withdrawal
Organophosphate
Salicylate toxicity
Serotonin syndrome
Stimulant intoxication (cocaine, methamphetamine)
Tricyclic antidepressant overdose
Psychiatric Presentations
Acute anxiety
Acute psychosis
Agitation:behavioral emergency
Bipolar disorder
Conversion disorder
Major depressive episode
Neuroleptic malignant syndrome
Suicidal ideation and attempt
Musculoskeletal and Rheumatologic Presentations
Acute low back pain (mechanical)
Bursitis
Cervical radiculopathy
Costochondritis
Gout (acute)
Lumbar radiculopathy
Pseudogout
Tendinitis
Dermatology Presentations
Acute eczema (Eczema acute flare)
Allergic contact dermatitis
Erythema multiforme
Henoch-Schönlein purpura
Pressure injury
Psoriasis (acute flare)
Stevens-Johnson syndrome
Toxic epidermal necrolysis
Urticaria (acute)
Environmental and Exposure Presentations
Envenomation (snake, spider, insect)
High-altitude illness
Hypothermia
Hematologic and Oncologic Presentations
Acute chest syndrome
Coagulopathy
Hyperviscosity syndrome
Sickle cell crisis (vaso-occlusive)
Symptomatic anemia
Thrombocytopenia (severe)
Tumor lysis syndrome
Pediatric-Specific Presentations
Bronchiolitis
Croup
Emergency delivery
Febrile seizure
Kawasaki disease
Neonatal jaundice
Neonatal sepsis
Nursemaid's elbow
Pediatric fever 0 to 28 days
Pediatric fever 29 to 60 days
Pediatric fever 61 to 90 days
Pyloric stenosis
Slipped capital femoral epiphysis
Intussusception
Endocrine and Metabolic Presentations
Adrenal crisis
Diabetic ketoacidosis
Hypercalcemia
Hyperosmolar hyperglycemic state
Hypertensive emergency
Hypertensive urgency
Hypoglycemia
Myasthenia gravis crisis
Myxedema coma
Severe hyperkalemia
Severe hyponatremia
Thyroid storm
ENT and Maxillofacial Presentations
Acute laryngitis
Acute otitis media
Acute pharyngitis
Cerumen impaction
Epistaxis (anterior)
Nasal foreign body
Otitis externa
Tympanic membrane perforation
Ophthalmologic Presentations
Acute angle-closure glaucoma
Central retinal artery occlusion
Chemical eye injury
Corneal abrasion
Corneal ulcer
Globe rupture
Ocular foreign body
Orbital cellulitis
Retinal detachment
Obstetric Presentations
Hyperemesis gravidarum
Painful vaginal bleeding in pregnancy
Placenta previa
Placental abruption
Preeclampsia:eclampsia
Preterm labor
Threatened:inevitable:incomplete abortion
Systemic and Miscellaneous Presentations
Anaphylaxis
Angioedema
Cannabis-induced hyperemesis
Cervical Spine Fracture (Hangman)
POCUS
Procedures
Calculators
Resuscitation
ECG Guide
Back
Clinical Assessment Checklist
Browse categories and answer follow-up questions to refine your symptom profile.
Approach to the Critical Patient
Immediate stabilization
Cervical spine immobilization priorities
▶
Manual in-line stabilization until rigid collar applied
▶
Avoid neck flexion or extension during all maneuvers
Log-roll technique for any repositioning
Rigid cervical collar placement (Philadelphia or Miami-J)
▶
Properly sized collar to prevent motion at C1-C2-C3
Reassess fit after any patient movement
Airway management precautions
▶
Inline stabilization maintained during laryngoscopy if intubation required
Video laryngoscopy preferred to minimize cervical motion
If respiratory compromise from high cervical injury, early airway control
Hemodynamic assessment
Shock pattern differentiation
▶
Neurogenic shock (bradycardia + hypotension)
▶
Vasopressor support: norepinephrine first-line
Atropine 0.5-1 mg IV for symptomatic bradycardia
IV fluid resuscitation: crystalloid bolus 500-1000 mL, reassess
Hemorrhagic shock (tachycardia + hypotension)
▶
Systematic search for occult bleeding sources in polytrauma
Massive transfusion protocol if hemodynamically unstable
MAP target >= 85 mmHg in presence of spinal cord injury
▶
Maintains spinal cord perfusion pressure
Critical decision points
Escalation triggers requiring immediate action
▶
Any new or progressive neurological deficit
▶
Emergent spine surgery consultation
Emergent MRI if not contraindicated
Type IIa fracture: do NOT apply cervical traction
▶
Flexion-distraction mechanism — traction worsens displacement
Halo vest or surgical fixation instead
Respiratory compromise
▶
C3-C5 phrenic nerve involvement risks diaphragmatic paralysis
Early intubation before decompensation
Blunt cerebrovascular injury (BCVI) concern
▶
CTA head and neck if fracture through transverse foramen or subluxation present
OR 2.2 for BCVI with OC-C3 fractures
Consultation and team activation
▶
Spine surgery (neurosurgery or orthopedic) for all hangman's fractures
▶
Emergent for Types IIa/III or any neurological deficit
Urgent for Types I/II without deficit
Trauma team activation for polytrauma presentation
▶
ATLS primary and secondary survey
Interventional radiology if vascular injury identified on CTA
History
Mechanism and presentation
Mechanism of injury
▶
Motor vehicle collision (most common in young adults)
▶
Forehead or face striking windshield or dashboard — hyperextension-axial load pattern
Speed and force of impact
Head position at time of collision
Fall from height
▶
Distance of fall
Head-first or face-first landing
Ground-level fall in elderly (most common mechanism in older patients)
▶
Low-energy falls can produce hangman's fracture in osteoporotic spine
Diving injury
▶
Shallow water impact
Combined hyperextension and axial loading
Assault or sports injury
Cardinal symptoms
▶
Posterior upper cervical neck pain (virtually universal)
▶
Severity disproportionate to apparent mechanism in elderly
Neck stiffness and guarding
Transient neurological symptoms at time of injury
▶
Transient upper or lower extremity weakness
Transient numbness or paresthesias
Loss of consciousness at time of injury
Neurological and vascular symptoms
Extremity neurological symptoms
▶
Upper extremity weakness
▶
Grip strength loss
Biceps or triceps weakness
Lower extremity weakness or gait instability
Numbness or paresthesias in dermatomal distribution
Bowel or bladder dysfunction
▶
Urinary retention or incontinence
Bowel incontinence
Respiratory symptoms
▶
Dyspnea at rest or with exertion
▶
Diaphragmatic paresis risk from C3-C5 involvement
Inability to take a deep breath
Vascular symptoms (BCVI concern)
▶
Unilateral severe headache
Visual changes or diplopia
Dizziness or vertigo
Facial droop or dysarthria (vertebrobasilar insufficiency)
Syncope
Risk factors and context
Patient-specific risk factors
▶
Age (elderly: low-energy mechanism sufficient)
▶
Osteoporosis or osteopenia
Metabolic bone disease
Pre-existing cervical spine disease
▶
Ankylosing spondylitis — altered fracture biomechanics
Diffuse idiopathic skeletal hyperostosis (DISH)
Rheumatoid arthritis — atlanto-axial instability may coexist
Prior cervical spine surgery
Alcohol or substance intoxication
▶
Mechanism contributor
Exam reliability confounder
Anticoagulant or antiplatelet use
▶
Epidural hematoma risk with anticoagulants
Review of systems
▶
Other sites of pain suggesting associated fractures
▶
Concomitant C1 ring fractures in ~26% of hangman's fractures
Subaxial cervical spine injury
History of malignancy (pathologic fracture consideration)
Suicidal ideation if mechanism involves hanging
Physical Exam
Vitals and general
Hemodynamic pattern interpretation
▶
Bradycardia + hypotension
▶
Neurogenic shock until proven otherwise
Heart rate < 60 bpm + SBP < 90 mmHg
Tachycardia + hypotension
▶
Hemorrhagic shock from associated injuries
Respiratory rate and oxygen saturation
▶
Rate >= 30 per minute as severity marker
SpO2 < 92% on room air requires supplemental oxygen
General appearance
▶
Posturing or voluntary cervical immobilization
Facial and forehead lacerations or contusions
▶
Suggest hyperextension mechanism
"Raccoon eyes" or "Battle sign" — skull base fracture association
Cervical spine examination
Posterior midline tenderness
▶
C2 spinous process tenderness (virtually always present)
Step-off deformity palpation at C2 level
Cervical spine immobilization maintained throughout exam
▶
No flexion-extension or rotation testing acutely
All movements in strict log-roll fashion
Neurological examination
Motor examination (upper extremities)
▶
Deltoid strength (C5)
Biceps strength (C5-C6)
Wrist extension (C6)
Triceps strength (C7)
Hand intrinsics and grip (C8-T1)
Motor examination (lower extremities)
▶
Hip flexion (L1-L2)
Quadriceps extension (L3-L4)
Ankle dorsiflexion (L4-L5)
Plantar flexion (S1)
Sensory examination
▶
Dermatomal light touch and pinprick mapping
Sacral sparing (perianal sensation — key prognostic marker)
Reflexes and pathological signs
▶
Deep tendon reflexes (biceps, triceps, brachioradialis, patella, Achilles)
Babinski sign bilaterally
Hoffman sign
Bulbocavernosus reflex
▶
Absence indicates spinal shock phase
Rectal tone assessment
Cranial nerve examination
▶
When vertebrobasilar insufficiency suspected
Facial sensation, extraocular movements, nystagmus
Trauma survey
Associated injury screening
▶
Scalp lacerations and skull fracture assessment
Chest examination for rib fractures, pneumothorax, hemothorax
Abdominal examination for solid organ injury
Long bone fractures (particularly upper extremity in hyperextension mechanism)
Pelvis stability
Differential Diagnosis
C2 fracture variants
Odontoid (dens) fracture (Anderson-D'Alonzo classification)
▶
Type I: Tip of dens, stable (ICD-10: S12.110)
Type II: Base of dens, most common and most unstable (ICD-10: S12.120)
Type III: Body of C2 extending into cancellous bone (ICD-10: S12.130)
Distinguishing feature: Fracture line at odontoid base versus bilateral pars
Atypical hangman's fracture
▶
Fracture through posterior vertebral body rather than pars interarticularis
Higher neurological risk — canal narrowing rather than widening
Neurological injury rate up to 33%
C2 lateral mass fracture
▶
Isolated lateral mass involvement
Lower instability than classic hangman's
Associated upper cervical injuries
Jefferson fracture (C1 burst fracture) — ICD-10: S12.000
▶
Coexists with hangman's fracture in ~26% of cases
Axial loading mechanism
Transverse ligament integrity determines stability
Atlanto-occipital dissociation
▶
High-energy trauma
Often fatal
BAI-BDI criteria on CT
Atlanto-axial instability
▶
Rheumatoid arthritis, Down syndrome backgrounds
Subaxial and ligamentous injuries
Subaxial cervical fracture-dislocation
▶
Different vertebral level (C3-C7)
SLIC classification applicable
Cervical ligamentous injury without fracture
▶
Occult on CT — requires MRI for diagnosis
Distractive flexion mechanism
Cervical cord injury without radiographic abnormality (SCIWORA)
▶
Neurological deficit with normal CT and MRI
More common in pediatric patients
Vascular and other
Blunt cerebrovascular injury (BCVI) — ICD-10: S15.001
▶
Vertebral artery dissection with hangman's fracture
Carotid artery injury in high-energy mechanisms
Pathologic fracture (metastatic disease, myeloma)
▶
Low-energy or atraumatic onset
Known malignancy history
Epidural hematoma
▶
Anticoagulated patients
Progressive neurological deficit after initial stability
Laboratory Tests
Routine trauma labs
Complete blood count
▶
Baseline hemoglobin for hemorrhagic shock assessment
Thrombocytopenia increases bleeding risk in operative management
Basic metabolic panel
▶
Electrolytes, creatinine for anesthesia planning
Glucose dysregulation in high cervical cord injury (autonomic dysfunction)
Coagulation studies
▶
PT/INR and aPTT
▶
Anticoagulant reversal planning if urgent surgery required
Fibrinogen if massive transfusion anticipated
Type and screen
▶
All patients with significant mechanism
Type and crossmatch if hemorrhagic shock
Toxicology and metabolic
Blood alcohol level
▶
Exam reliability assessment
Mechanism contribution assessment
Urine drug screen
▶
CNS depressants masking neurological exam
Lactate
▶
Occult hypoperfusion in polytrauma
>= 2 mmol/L indicates tissue hypoperfusion
Venous blood gas
▶
Acidosis severity in shock states
pCO2 monitoring if respiratory compromise
Osteoporosis workup (non-emergent)
Calcium and phosphate
▶
Metabolic bone disease in elderly fragility fractures
Vitamin D (25-OH)
▶
Supplementation guidance for bone healing
PTH level
▶
Secondary hyperparathyroidism assessment
Note: No specific lab test diagnoses hangman's fracture
Diagnostic Tests
Scoring Systems
Levine-Edwards Classification (primary management guide)
▶
Type I: Hairline fracture, no angulation, displacement <= 3 mm, C2-C3 disc intact
▶
Stable pattern
Management: rigid cervical collar 10-14 weeks
Union rate 94-100%
Type II: Displaced fracture with angulation > 11 degrees, displacement > 3 mm, C2-C3 disc disrupted
▶
Discoligamentous instability
Management: halo vest or surgery (displacement >= 6 mm favors surgery)
Type IIa: Minimal translation but severe angulation, flexion-distraction mechanism, C2-C3 disc disrupted
▶
No traction — traction worsens displacement
Management: rigid halo or surgical fixation
Type III: Displaced with bilateral C2-C3 facet dislocation, severe displacement and angulation
▶
Most unstable pattern
Management: surgical fixation required
NEXUS Criteria (cervical spine clearance)
▶
Five criteria: no midline tenderness, normal alertness, no intoxication, no focal neurological deficit, no painful distracting injury
▶
All five must be absent to clear cervically without imaging
Sensitivity 99.6%, specificity 12.9%
Hangman's fracture patients typically do NOT meet NEXUS low-risk criteria
Canadian C-Spine Rule (CCR)
▶
Three-part decision aid for alert, stable trauma patients
▶
High-risk factors: age >= 65, dangerous mechanism, paresthesias in extremities
Low-risk factors: simple MVC, ambulatory, delayed onset neck pain, absence of midline tenderness
Sensitivity 99.4%, specificity 45.1%
ASIA/ISNCSCI Spinal Cord Injury Grading
▶
Grade A: Complete — no motor or sensory function below injury level
▶
No sacral sparing
Grade B: Incomplete — sensory but no motor function preserved below injury
Grade C: Incomplete — motor function below injury, majority of key muscles < grade 3
Grade D: Incomplete — motor function below injury, majority of key muscles >= grade 3
Grade E: Normal motor and sensory function
MRI
Indications for MRI cervical spine
▶
Neurological deficits present (any motor or sensory deficit)
▶
Spinal cord compression assessment
ASIA grading correlation
CT shows fracture but mechanism suggests ligamentous injury
▶
C2-C3 disc disruption assessment — determines stability classification
Neck pain disproportionate to CT findings
Concern for occult ligamentous injury in obtunded patient
▶
Clearance prior to collar removal
MRI findings in hangman's fracture
▶
C2-C3 disc disruption
▶
Key determinant distinguishing Types I/II/IIa/III
Hyperintense disc signal on T2 indicates disruption
Spinal cord signal change
▶
T2 hyperintensity indicates edema or contusion
Intramedullary hemorrhage on T2* or GRE — poor prognosis
Epidural hematoma
▶
T1 hyperintense collection compressing cord
Emergent surgical drainage if compressive
Prevertebral hematoma
▶
T2 hyperintense soft tissue anterior to vertebral bodies
Contraindications and limitations
▶
Non-MRI compatible implants (pacemakers, some surgical hardware)
Patient hemodynamic instability — CT/CTA first
Artifact from cervical collar (removable components may be needed)
CT
CT cervical spine (reference standard for bony injury)
▶
Sensitivity 98-100% for clinically significant fractures
▶
Specificity > 97%
ACR Appropriateness Criteria: usually appropriate for suspected cervical spine trauma (2024 update)
Protocol: non-contrast, thin-slice (1 mm) with sagittal and coronal reformats
▶
Bone algorithm for fracture detail
Soft tissue algorithm for prevertebral swelling
Plain radiographs NOT recommended as primary screening
▶
Sensitivity only 36-64% for cervical fractures
CT findings in hangman's fracture
▶
Bilateral fractures through C2 pars interarticularis (isthmus/pedicles)
▶
Fracture lines clearly visible on axial and sagittal reformats
Anterior displacement of C2 vertebral body relative to C3 (Type II/III)
Angulation at C2-C3 disc space
Facet joint assessment at C2-C3
▶
Perched or dislocated facets indicate Type III
Transverse foramen involvement
▶
Indicates vertebral artery injury risk — triggers CTA
Associated fractures
▶
C1 ring fractures in 26% of cases
Subaxial fractures in up to 10%
CTA head and neck (BCVI screening)
▶
Indications: fracture through transverse foramen, subluxation/dislocation, any upper C-spine fracture (C1-C3) with OR 2.2 for BCVI
▶
Vessel injury rates up to 17% in upper cervical fractures
Identifies vertebral artery dissection, pseudoaneurysm, occlusion
Modified Denver criteria or EAST guidelines guide CTA use in trauma
Ultrasound
Focused Assessment with Sonography in Trauma (FAST exam)
▶
Not diagnostic for cervical spine injury
▶
Used in polytrauma setting to identify abdominal free fluid
Pericardial tamponade assessment
Extended FAST (eFAST)
▶
Pneumothorax identification
Bilateral pleural sliding assessment
Vascular ultrasound (limited role in acute setting)
▶
Carotid duplex for BCVI if CTA not immediately available
▶
Less sensitive than CTA for vertebral artery injury
Does not visualize C1-C3 segment well
Bedside airway ultrasound
▶
Tracheal confirmation after intubation if capnography unavailable
Cricothyroid membrane identification for emergency airway planning
Disposition
Admission criteria
ICU admission indications
▶
Neurogenic shock (bradycardia + hypotension requiring vasopressors)
▶
Hemodynamic monitoring and vasopressor titration
Respiratory compromise or diaphragmatic paresis
▶
Ventilator management
High-grade spinal cord injury (ASIA A or B)
▶
MAP goal >= 85 mmHg maintained for 7 days (Class IIb evidence)
Type III fractures requiring surgical planning
Polytrauma with hemodynamic instability
General ward admission indications
▶
Type II or IIa fractures without neurological deficit
▶
Spine surgery consultation and definitive management planning
Halo vest application or pre-operative planning
All fractures with pending surgical decision
Inability to arrange safe outpatient follow-up
Discharge criteria (Type I only)
Copy
Requirements for discharge of isolated Type I fractures
▶
Neurologically intact — complete and normal neurological exam
Hemodynamically stable throughout observation
Spine surgery consultation completed and discharge approved
Rigid cervical collar fitted and patient instructed on care
Reliable follow-up arranged within 1-2 weeks
Patient and family clearly understand return-to-ER criteria
Transfer criteria
Transfer to spine surgery-capable center
▶
Any Type II, IIa, or III fracture at facility without spine surgery
Any neurological deficit requiring surgical decompression
BCVI identified requiring endovascular management
All transfers with cervical spine immobilization maintained
▶
HEMS or ALS ground transport with spinal precautions
Treatment
Immediate interventions
Cervical immobilization (all types)
▶
Rigid cervical collar (Philadelphia or Miami-J)
▶
Properly sized: prevents chin and occiput overhang
Maintains until definitive management determined
Log-roll precautions for all repositioning
▶
Minimum 3-person log-roll with dedicated head/neck controller
Analgesia
Pain management protocol
▶
IV acetaminophen 1000 mg every 6-8 hours (preferred — no sedation)
▶
Dose reduction for body weight < 50 kg: 15 mg/kg
IV opioids (avoid oversedation — neurological exam preservation critical)
▶
Morphine 2-4 mg IV every 4-6 hours PRN
Hydromorphone 0.2-0.4 mg IV every 4-6 hours PRN if morphine contraindicated
NSAIDs (acceptable if no contraindications, but may impair bone healing)
▶
Avoid in patients anticipated for surgical fusion
Ketamine low-dose adjunct (0.1-0.3 mg/kg IV) for opioid-sparing
Type-specific management
Type I: Conservative management
▶
Rigid cervical collar for 10-14 weeks
▶
Philadelphia or Miami-J collar — worn 24/7
Collar removal only under physician supervision
Union rate 94-100% with conservative management
▶
All 28 patients in multicenter prospective study healed at 1 year
Repeat CT at 6 weeks and 3 months to confirm healing
Flexion-extension radiographs at 6 weeks for dynamic stability assessment
Type II: Management options
▶
Displacement < 6 mm without angulation: rigid collar trial acceptable
▶
Close follow-up with repeat imaging at 2-4 weeks
Displacement >= 6 mm or failure to maintain alignment: surgical fixation
▶
Halo vest immobilization: alternative in selected patients
▶
Halo ring applied under fluoroscopic guidance
4-pin fixation with 6-8 lbs torque (frontal pins) and 4-6 lbs (occipital pins)
Surgery: anterior C2-C3 ACDF with plating or posterior C2 pedicle screw fixation
Type IIa: Modified approach
▶
Do NOT apply cervical traction
▶
Flexion-distraction mechanism — traction worsens posterior element separation
Rigid halo vest immobilization with mild compression
Surgical stabilization if halo fails or neurological deficit present
Type III: Surgical fixation required
▶
Anterior approach: C2-C3 discectomy and fusion (ACDF) with plating
▶
Provides immediate stability
Allows early mobilization
Fusion rate ~99%
Posterior approach: C2 pedicle screw fixation or C1-C3 Harms-Goel construct
▶
CT-guided C2 pedicle screw placement preferred for accuracy
Minimally invasive percutaneous screw fixation available at specialized centers
Combined anterior-posterior approach for severe instability or failed primary fixation
BCVI management (when identified)
Antithrombotic therapy per institutional protocol
▶
Aspirin 81-325 mg daily — commonly used for low-grade BCVI
▶
Grade I-II vertebral artery dissection (intimal irregularity or < 25% stenosis)
Heparin infusion: initial 60-80 units/kg bolus, then 12-18 units/kg/hour
▶
Target aPTT 60-100 seconds
Preferred for high-grade BCVI (occlusion, pseudoaneurysm) or stroke risk
Duration: typically 3-6 months with repeat vascular imaging
Endovascular intervention for pseudoaneurysm or high-grade stenosis
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Stenting or coil embolization at experienced centers
DVT and prophylaxis
VTE prophylaxis
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Mechanical prophylaxis first (sequential compression devices)
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Initiated immediately on admission
Both lower extremities
Pharmacologic prophylaxis (low molecular weight heparin)
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Enoxaparin 40 mg subcutaneously daily
Hold until surgical clearance from spine team
Contraindicated with active epidural hematoma
Special Populations
Pregnancy
Imaging considerations
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CT cervical spine indicated despite radiation exposure
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Life-threatening injury takes priority over fetal radiation exposure
Fetal radiation dose from cervical CT approximately 0.001-0.01 mGy (negligible)
MRI preferred for follow-up ligamentous assessment
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Avoid gadolinium contrast in first trimester unless essential
Fetal monitoring after significant trauma
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Cardiotocography for >= 4 hours post-trauma if > 24 weeks gestation
Management modifications
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Halo vest application feasible but requires careful pin placement
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Avoid in advanced pregnancy due to body habitus
Surgical positioning: left lateral tilt 15 degrees to relieve aortocaval compression
Multidisciplinary team: spine surgery, obstetrics, anesthesia
NSAIDs contraindicated in third trimester (premature ductal closure)
Opioids: short-term use acceptable with neonatal monitoring
Geriatric
Epidemiology and risk
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Ground-level falls are most common mechanism in elderly (>= 65 years)
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Low-energy mechanisms sufficient to produce hangman's fracture in osteoporotic C-spine
Higher rate of concomitant injuries from falls (hip fracture, traumatic brain injury)
Ankylosing spondylitis and DISH alter fracture biomechanics — larger force transmission
Management considerations
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Halo vest poorly tolerated in elderly
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Pin site infections more common
Aspiration risk with restricted neck position
Surgical fixation often preferred over prolonged halo immobilization
Anticoagulant reversal if on warfarin, DOACs, or antiplatelet agents
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Warfarin: 4-factor PCC + vitamin K
Dabigatran: idarucizumab 5 g IV
Rivaroxaban/apixaban: andexanet alfa per weight-based protocol
Post-injury osteoporosis treatment
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Calcium 1200 mg/day + vitamin D 800-2000 IU/day for bone healing
Bisphosphonate therapy initiation after fracture healing (6+ weeks)
Delirium prevention in immobilized elderly patients
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Minimize benzodiazepines and anticholinergics
Early mobility as cleared by spine team
Pediatrics
Anatomical considerations
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Children < 8 years: relatively large occiput shifts fulcrum to C2-C3 (vs C5-C6 in adults)
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Upper cervical injuries more common in young children
Pseudosubluxation (physiologic) at C2-C3 in children up to 7 years
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Posterior cervical line (Swischuk's line) differentiates from true injury
Line from C1 to C3 posterior arches — within 2 mm of C2 arch is normal
Growth plates can mimic fracture lines on CT (synchondroses)
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MRI clarifies true fracture vs normal anatomy
Imaging approach
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CT radiation concern significant in children
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NEXUS and CCR validated but with different performance characteristics in pediatrics
MRI preferred when CT findings equivocal or radiation dose concern
SCIWORA more common in pediatric population
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MRI essential if neurological deficit with normal CT
Management modifications
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Rigid collar sizing critical — pediatric sizes required
Halo vest available in pediatric sizes
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More pins (8-12) at lower torque to distribute skull forces
Surgical thresholds similar to adults but growth plate preservation important
Neurological recovery potential greater in children than adults
Background
Epidemiology
Incidence and demographics
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Hangman's fracture accounts for 15-20% of all cervical spine fractures
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Second most common C2 fracture after odontoid fractures
Bimodal age distribution
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Young adults (20-40 years): high-energy mechanisms (MVC, diving)
Elderly (> 65 years): low-energy falls
Male predominance in high-energy mechanisms (MVC)
Mechanism distribution
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Motor vehicle collisions: most common overall
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Face or forehead striking windshield or dashboard
Falls from height or ground level: increasingly prevalent with aging population
Diving injuries: associated with cervical cord injury
Associated injuries
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Concomitant C1 ring fractures: ~26% of cases (Li et al. systematic review 2006)
Blunt cerebrovascular injury: OR 2.2 for upper C-spine fractures
Head injury/TBI common in high-energy mechanisms
Thoracic and abdominal injuries in MVC polytrauma
Neurological injury rate
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Overall neurological deficit: ~26% (mostly mild) despite bilateral fractures
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Paradoxical spinal canal widening from fracture pattern protects cord
Atypical hangman's fractures: up to 33% neurological injury rate
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Fracture through posterior vertebral body narrows canal
Pathophysiology
Injury mechanism
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Hyperextension combined with axial loading is the classic mechanism
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Head forced into extension — failure of C2 pars interarticularis in tension
Posterior elements separate — anterior longitudinal ligament may avulse
Flexion-distraction (Type IIa variant)
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Posterior element separation with C2-C3 disc disruption and angulation
NO translation — angulation is the predominant finding
Fracture anatomy
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Bilateral fractures through the pars interarticularis (isthmus) of C2
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Separates C2 into two segments: posterior ring and anterior vertebral body
Anterior body with C3 may translate forward (spondylolisthesis)
Paradoxical canal decompression
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Posterior ring remains attached to C1
Anterior body moves forward — net effect widens spinal canal at C2 level
Explains low neurological injury rate in typical hangman's fracture
Atypical variant: fracture through posterior vertebral body
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Posterior wall of vertebral body becomes displaced fragment
Bony fragment narrows canal — high cord injury risk
Stability determinants
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C2-C3 disc integrity is the key stability determinant
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Intact disc (Type I): inherently stable
Disrupted disc (Types II, IIa, III): progressive instability
C2-C3 facet capsule disruption indicates Type III — most unstable
Displacement > 3 mm and angulation > 11 degrees predict instability
Therapeutic Considerations
Evidence base for management
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Conservative management outcomes (Prost et al. 2019, multicenter prospective n=34)
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94-100% fracture union rate with rigid collar or halo vest
All re-evaluated patients achieved healing at 1-year follow-up
Surgical fixation reserved for failed conservative management or Type III
Systematic review evidence (Li et al. 2006, European Spine Journal)
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Type I: collar management uniformly successful
Type III: surgery universally required
Type II: remains most controversial — displacement threshold guides choice
Systematic review (Murphy et al. 2017, Journal of Orthopaedic Trauma)
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Fusion rates ~99% with surgical fixation
Comparable outcomes between anterior (ACDF) and posterior approaches
Surgical decision thresholds
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Type II displacement >= 6 mm: surgical fixation preferred over halo
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Failure rate of halo higher with greater displacement
Type IIa: compression (not traction) corrects angulation
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Critical principle — traction increases posterior element gap
Type III: bilateral facet dislocation requires surgical reduction and fixation
BCVI therapeutic principles
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Antithrombotic therapy reduces stroke risk from vertebral artery dissection
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Screening with CTA essential given OR 2.2 for BCVI in upper cervical fractures
Denver grading scale guides treatment intensity
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Grade I-II: antithrombotic therapy
Grade III (pseudoaneurysm): endovascular or anticoagulation
Grade IV (occlusion): anticoagulation
Grade V (transection): surgical or endovascular repair
Patient Discharge Instructions
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Diagnosis and injury summary
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Cervical spine fracture at the C2 level (hangman's fracture)
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Fracture of the second neck vertebra
You have been fitted with a rigid cervical collar to immobilize your neck while the fracture heals
Collar instructions
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Wear your rigid cervical collar at all times — 24 hours a day, 7 days a week
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Do not remove the collar without specific instructions from your spine surgeon
You may gently clean the skin under the collar using a damp cloth with a helper holding your head still
Sleep with the collar on — use a cervical pillow if recommended by your surgeon
No driving while wearing the cervical collar
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Restricted range of motion makes safe driving impossible
Activity restrictions
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No lifting anything heavier than a glass of water until cleared by spine surgeon
No sports, running, or vigorous physical activity
No swimming or submersion of collar in water
Stairs are permitted with caution and a handrail
Follow-up schedule
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Spine surgery clinic within 1-2 weeks of discharge — keep this appointment
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Your surgeon will assess fracture alignment and healing
Repeat CT scan at approximately 6 weeks to assess healing
Repeat CT or flexion-extension X-rays at 3 months to confirm fracture union
Return to the emergency department immediately for
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New or worsening numbness, tingling, or weakness in the arms or legs
Difficulty breathing or shortness of breath
Loss of control of bladder or bowel function
Sudden worsening of neck pain
Difficulty swallowing
Visual changes, double vision, severe headache, or dizziness
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May indicate vertebral artery injury (blood vessel near the fracture site)
Fever > 38.5 degrees Celsius
Collar pin site redness, swelling, or discharge (if halo vest placed)
Medications and bone healing
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Take prescribed pain medications as directed
Avoid anti-inflammatory medications (ibuprofen, naproxen) unless specifically prescribed
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These medications may interfere with bone healing
Calcium and vitamin D supplements as prescribed for bone healing
No smoking — smoking significantly impairs fracture healing and fusion
References
Guidelines and key sources
Prost S, Barrey C, Blondel B, et al.
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Hangman's Fracture: Management Strategy and Healing Rate in a Prospective Multi-Centre Observational Study of 34 Patients
Orthopaedics and Traumatology: Surgery and Research (OTSR). 2019
PMID: 31005699
Li XF, Dai LY, Lu H, Chen XD.
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A Systematic Review of the Management of Hangman's Fractures
European Spine Journal. 2006
PMID: 16235100
Murphy H, Schroeder GD, Shi WJ, et al.
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Management of Hangman's Fractures: A Systematic Review
Journal of Orthopaedic Trauma. 2017
PMID: 28816880
Hassankhani A, Freeman CW, Banks J, et al.
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ACR Appropriateness Criteria: Acute Spinal Trauma — 2024 Update
Journal of the American College of Radiology. 2025
https://linkinghub.elsevier.com/retrieve/pii/S1546-1440(25)00119-X
Schroeder GD, Vaccaro AR, Welch WC, et al.
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Best Practices Guidelines: Spine Injury
American College of Surgeons. 2022
https://www.facs.org/media/k45gikqv/spine_injury_guidelines.pdf
Du PZ, Christopher ND, Ganapathy V.
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Association Between Cervical Fracture Patterns and Blunt Cerebrovascular Injury When Screened With CTA
The Spine Journal. 2024
PMID: 37734494
Beucler N.
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Open Reduction and C1-C3 Posterior Harms-Goel Fixation for Unstable Hangman's Fracture: Technical Note
Neurosurgical Review. 2024
PMID: 39240373
Fielding JW, Francis WR, Hawkins RJ, Pepin J, Hensinger R.
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Traumatic Spondylolisthesis of the Axis
Clinical Orthopaedics and Related Research. 1989
PMID: 2912636
Starr JK, Eismont FJ.
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Atypical Hangman's Fractures
Spine. 1993
PMID: 8272942
Expert Panel on Neurological Imaging and Musculoskeletal Imaging
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ACR Appropriateness Criteria: Suspected Spine Trauma
Journal of the American College of Radiology. 2019
https://linkinghub.elsevier.com/retrieve/pii/S1546-1440(19)30142-5
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Management Protocols
Cervical Spine Fracture (Hangman)