coxa vara

Definition

Chronic, non metabolic bone disorder

Characterised by increased bone resorption, bone formation and remodelling

Epidemiology

Rare < 40

1 – 3 % population over 60

M > F

Aetiology

Unknown

Paramyxovirus implicated

- measles

- RSV

- canine distemper virus

Electron Microscope

Definition

Deformity of proximal femur with neck-shaft angle <125°

Characterised by

- coxa vara

- decreased femoral anteversion

- limp / trendelenberg

- stress fractures

- early OA

Classification   

"ACDDC"

Acquired

2° to underlying disorder

- rickets