survival

Indications

1.  RC arthropathy / > 70 / low functional demand

2.  Revision TSR

3.  Failed Hemiarthoplasty in proximal humerus fracture

Design

Concept

Femur

- removal of femoral head cartilage

- resurfacing with metal

- cemented / uncemented

Acetabulum

- standard technique

Bearing surface

- metal on metal

Indications

Relatively young man (40 - 50)

OA

Principles

Treatment algorithm similar to OS

Overall prognosis similar to OS

- 70% long term survival

Definition

A malignant neoplasm composed of small round cells of uncertain histogenesis

Genetics

Recent data suggests it is of neuroepithelial derivation

- ? neuroectodermal cells