OCD

Case 1:  Type 3 Large Unstable MFC OCD

MRI

MRI demonstrates large OCD with fluid completely separating bone on all views

Plan

Probably unstable

NHx

European Orthopaedic Paediatric Study JPO 1999

- 452 patients

- juvenile and adult

Findings

- stable lesion with cartilage intact and no dissection had good prognosis

- if signs dissection, surgical management better than non surgical

- sclerosis on x-ray poor prognostic sign

- lesions > 2cm poor prognosis

- 20% OCD in juveniles abnormal x-ray findings at 3 years (not benign process)

Definition

Osteochondritis Dissecans

- separation of avascular fragment of bone & cartilage

Epidemiology

M : F = 2:1

Mean age 18 years

- can present as young as 9

4:1000

Definition

Fracture talus through articular cartilage into subchondral bone

- 2° force transmitted from distal tibia

Osteochondritis dissecans v osteochondral fracture

Epidemiology

6% ankle sprains

Average age = 25 

M > F

Location