Congenital knee dislocation

Epidemiology

Rare 

- 2:100 000

- 1/100 as common as DDH

- 1/3 bilateral 

- F:M 2:1

Associations

45% DDH

30% CTEV

Larsen Syndrome

Down's Syndrome

Arthrogryposis

Aetiology

Unknown

Two Theories

1. Intra-uterine packaging defect