Anterior displacement of peroneal tendons out of peroneal groove
Most common in young adults
Acute injury often missed
Congenital
3 % neonates
- resolves spontaneously
Traumatic
Occurs following sporting activities
A. Ankle Fracture
Types
- Weber A 4%
- Weber C 33%
- Displaced large posterior malleolar
Any OA develops in first 2 years
Causes
- articular damage at time of injury
- non anatomical reconstruction
- complications i.e. infection
Pus collection in the epidural space
Usually haemotogenous seeding
Very rare
- 37 / 1 000 000 patients with LBP
- 1 /10 000 admissions
- most common in old men
Average age 68 years
3/4 males
Rare in paediatrics
Compression of some or all of the nerve roots in the cauda equina
- bladder dysfunction
- bowel dysfunction
- saddle anaesthesia
- variable motor and sensory loss
HNP
- most common
Epidural haematoma
- post surgical
- spinals and anticoagulation