enchondroma

Definition

Benign intramedullary cartilage lesion

Etiology

Epidemiology

Most common bony tumour of hand

Risk malignant transformation isolated lesion is < 2%

- more likely in long bones than hands

Site

Proximal phalanx > middle

Syndromes

Ollier's

- multiple enchondromatosis

- risk of transformation 10 - 25%

Maffuci's

Definition

Benign intramedullary cartilage lesion

Aetiology

Enchondroma are presumed to be remnants of hyaline cartilage

- derived from the epiphyseal growth mechanism that failed to undergo enchondral ossification

Epidemiology

10% of benign bone tumours