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Home › Body Atlas › Bones › Fibular Shaft
Bone Lower Leg

Fibular Shaft

corpus fibulae

The fibular shaft is the slender diaphysis of the fibula running between the fibular head and the lateral malleolus, largely surrounded by muscle with no direct weight-bearing function. Its surfaces provide attachment for the peroneal muscles laterally and the deep posterior compartment muscles medially. The interosseous crest of the fibula faces the tibia and provides the lateral attachment of the interosseous membrane.

Anatomical Data

Structure & Landmarks

Articulations
  • Interosseous membrane (medial, soft tissue)
  • Proximal tibiofibular joint (head)
  • Inferior tibiofibular syndesmosis (distal)
Landmarks
  • Anterior border (palpable distally)
  • Interosseous crest (medial)
  • Posterior border
  • Nutrient foramen (mid-shaft, facing distally)
OssificationSingle primary ossification centre present from the 8th fetal week; distal epiphysis appears at age 1-2 and fuses at 15-17 years, proximal epiphysis appears at age 3-4 and fuses at 16-19 years.
Clinical Relevance

Clinical Notes

The fibular shaft is harvested as the most commonly used vascularised bone graft in reconstructive surgery, based on the peroneal artery. Fibular free flaps reconstruct mandible, tibia, femur, and spine defects up to 25 cm in length. Isolated fibular shaft fractures from direct trauma (nightstick equivalent) heal without surgery when the interosseous membrane and syndesmosis are intact. Stress fractures of the fibular shaft occur in runners, typically in the distal third.

Pathology

Common Injuries & Conditions

Fibular Shaft Fracture

Often from a direct blow; isolated shaft fractures heal well because the fibula carries little body weight.

Fibular Stress Fracture

A stress fracture in runners, usually in the distal third.

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