tumour prosthesis

AO Classification

Types

1. Supracondylar

2. Unicondylar

3. Intracondylar

Xrays

Supracondylar / Extra-condylar

Implant Options

1.  Long stem cemented revision femoral stem

Modern cementing techniques
- removal of neocortex

Advantage
- use in all cases
- good with elderly fragile bone
- can use Abx cement (decreases infection rate)

Indications
- Paprosky Types I – IV
- very versatile

Technique

- complete removal / debridement of neocortex

Epidemiology

Uncommon

- 4% OS

Females more common 

- similar to GCT

NHx

Less aggressive locally

- less metastasis

- size / location & duration of symptoms don't correlate with outcome

Arise from cortex of bone / periosteum

- parosteal 

- periosteal

- high grade juxtacortical