Isolated Tibial Shaft Fracture

Description

This is a break of the tibia (shinbone) in its shaft while the fibula — the thin outer bone — stays intact. The unbroken fibula can act like a built-in splint.

How it happens (the mechanism)

A twisting or bending force breaks the shinbone while the slimmer fibula survives. That intact fibula is a double-edged splint: it often stabilizes the leg, but because it holds its length, it can occasionally lever the healing tibia into a slight inward tilt over the weeks in a cast — which is why alignment is watched with periodic X-rays.

Symptoms

Pain, swelling, and tenderness of the shin, with difficulty or refusal to bear weight.

Doctor examination and imaging

The doctor checks alignment and the leg’s circulation and feeling; X-rays show the tibia fracture and the intact fibula.

Treatment

Most are treated in a long-leg cast for several weeks, with X-rays to confirm alignment. Surgery is occasionally needed if the bone will not stay straight. As with any shin fracture, the leg is watched early for swelling and pressure.

Recovery and long-term outlook

These heal well; the routine alignment checks are simply how a straight, healed leg is ensured.

When to call the doctor

Call right away or seek emergency care if pain becomes severe or out of proportion — especially pain when the toes are gently moved or stretched — or the toes become numb, pale, blue, or cold, or the cast feels dangerously tight. These can signal dangerous pressure building within the leg (compartment syndrome). Also call for fever, worsening swelling, or drainage.

Learn more

OrthoInfo (AAOS) — Growth Plate Fractures: orthoinfo.aaos.org

This information is for educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. For specific concerns about your child, consult a board-certified, fellowship-trained pediatric orthopaedic surgeon.