5th Metatarsal Avulsion (Dancer’s) Fracture


What is an Avulsion Fracture

An Avulsion fracture is where a tendon or ligament that is attached to a bone is subjected to such force that a piece of bone is pulled off.


What is a 5th Metatarsal Avulsion Fracture

 A fifth metatarsal avulsion fracture is where the peroneus brevis tendon which attaches to the base of the fifth metatarsal pulls and causes a fracture of the fifth metatarsal.

Causes of a 5th Metatarsal Avulsion Fracture

 A fifth metatarsal avulsion fracture typically occurs with an inversion injury. The sudden pull of the peroneus brevis muscles that occurs when rolling you ankle results in the fracture of the fifth metatarsal.

An avulsion fracture can also occur with a sudden force applied to the 5th metatarsal bone. 


Types of a 5th Metatarsal Avulsion Fracture


 


Complications of a 5th Metatarsal Avulsion Fracture

Complications that can occur include:

  • Non union of the fracture site
  • Joint disruption resulting in arthritis long term
  • Impingement of other structures

Most 5th metatarsal avulsions fractures resolve well long term. It is important that correct treatment is implemented to avoid long term complications with an avulsion fracture

 


Treatment of a 5th Metatarsal Avulsion Fracture

Treatment varies on the degree of displacement of the avulsed piece of bone treatment options can include:

  • CAM walker immobilisation
  • Supportive insoles
  • Stiffer more supportive shoes
  • Surgical fixation of the 5th metatarsal.

It is important that correct treatment implemented to avoid long term complications with an avulsion fracture

 

Call The Foot and Ankle Centre for further advice on professional management and treatment options.