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Background

DefinitionKnee OCD MRI Cartilage Intact

 

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

 

Acute

Definition

 

Infection of bone 2° blood-borne bacteria

 

Epidemiology

 

Most common children

- peak 10 years

 

True haematogenous OM rare in adults

- usually involves spine

 

M: F 2:1

 

Site

 

Most common femur & tibia