Toddler Fracture (Tibial Spiral Fracture)

Definition

• Spiral fracture of the distal one-third of the tibia.
• Occurs due to a low-energy rotational or twisting injury.
• Typically occurs in children aged 1–3 years.
• Usually non-displaced.
• The fibula is usually intact.

Mechanism

• Sudden torsional force.
• May occur while twisting during play.
• May follow a minor fall.
• May occur while tripping during walking or running.
• There may be no clear history of trauma.

Clinical Presentation

• Acute limp or refusal to walk.
• The child may still bear partial weight.
• Minimal swelling.
• Usually no deformity.
• The history may be trivial or absent.

Important Clinical Sign

• Pain on passive external rotation of the foot is highly suggestive of toddler fracture.
• This can be particularly useful when the initial X-ray is normal.

Examination

• Diffuse tibial tenderness.
• The child may cry when the leg is handled.
• External rotation of the foot produces severe pain.

X-ray Findings

Early X-ray

• May be normal.
• May show a faint spiral fracture line in the distal tibia.
• The fracture may be best seen on the AP view.
• The lateral view may be normal.

Delayed X-ray

• At 2–3 weeks, periosteal reaction and callus formation may become visible.
• Sometimes this is the only radiological evidence of the fracture.

Important Diagnostic Principle

• Toddler fracture is primarily a clinical diagnosis.
• A negative initial X-ray does not exclude the fracture.

Differential Diagnosis of a Limping Toddler

Infection

• Osteomyelitis.
• Septic arthritis.
• Look for fever, a toxic appearance, and raised inflammatory markers.

Trauma-related Causes

• Plantar puncture wound.
• Retained foreign body.

Malignancy

• Acute leukemia.
• Clues include night pain, systemic symptoms, and pallor.

Clinical Tip

• Pain with passive external rotation of the foot favors toddler fracture.

Treatment

• Standard treatment is an above-knee (long-leg) cast.
• Duration is approximately 3 weeks.
• The cast controls rotation and helps prevent displacement.

Prognosis

• Healing is usually excellent.
• Complications are rare.
• Complete recovery is expected.

Exam Pearls

• Spiral fracture of distal tibia in a toddler.
• Age: 1–3 years.
• Minimal or unnoticed trauma.
• Fibula usually intact.
• Initial X-ray may be normal.
• External rotation pain is the key clinical sign.
• Treat according to clinical suspicion even when the initial X-ray is negative.

Courtesy: Dr Amr Abdelgawad
University of Texas, USA