im screw

Mechanism

Usually a direct blow 

- less commonly a fall on the outstretched hand

RTA / sporting accidents commonest causes

Can be pathological as a result of radionecrosis

- eg following radiotherapy for breast cancer.  

Incidence

Fractures of the clavicle are common

Metatarsal Fractures

Indications for Surgery

1.  Displacement > 4 mm

2.  Angulation > 10^o

3.  Intra-articular

Base of 5th Metatarsal

Classification

Zone 1

- avulsion fractures