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$Displaced 5th metatarsal fracture$

AP, lateral, and oblique radiographs of the foot are routinely obtained, ideally with the patient bearing weight, however due to initial pain and swelling, weight bearing views may not be possible. Type III: non-unions with obliteration of the intramedullary canal.Type II: delayed fracture healing with a widened fracture line and intramedullary sclerosis.Type I: acute fractures without intramedullary sclerosis.Torg and colleagues defined three categories of fifth metatarsal base fractures based on healing potential and radiographic appearance: Type IIIB: intra-articular tuberosity avulsions.Type IIIA: extra-articular tuberosity avulsions.Type II: chronic metadiaphyseal fractures with either a clinical symptoms or radiologic evidence of stress reaction.Type IB: acute, comminuted metadiaphyseal fractures.Type IA: acute, undisplaced, metadiaphyseal fractures.

$displaced 5th metatarsal fracture$

Zone III - the proximal diaphyseal region - stress fractureĭeLee and colleagues separated proximal fifth metatarsal fractures into:.

Zone II - the metadiaphyseal region - Jones fracture (at the level of 4th/5th intermetatarsal joint).

Zone I - the tuberosity - avulsion fracture (more than 90% fractures in their study).

Lawrence and Botte divided the proximal fifth metatarsal into three distinct fracture zones:

Fractures at the junction of metaphysis and diaphysis.

Fifth metatarsal fractures are classically categorised based on location although this system is ambiguous because the precise anatomic location of the physeal junctions is not well defined: Repetitive strain can cause stress type fractures.Ĭlassically fractures of the fifth metatarsal result from indirect inversion type injuries. Cadaveric studies suggest that the lateral band of the plantar aponeurosis tethers the fifth metatarsal to create avulsion fractures of the tuberosity, with the peroneus brevis tendon contributing as the major deforming force to further displacement.įractures of the 1st - 4th metatarsals are classified by anatomic location as base, shaft and neck fractures. Indirect injuries include falls on plantarflexed and fixed foot or inversion injuries.

$displaced 5th metatarsal fracture$

Direct injuries include falls, motor vehicle accidents, crush injuries or a fall of heavy objects. The mechanism of injury may be direct, indirect or repetitive trauma. The fifth metatarsal is reported to be the most commonly injured. They are ten times more common than Lisfranc injuries. Metatarsal fractures are common, and occur in isolation or in conjunction with concomitant other injuries to the foot and other metatarsals.

$Displaced 5th metatarsal fracture$