OCD is an abbreviation of 'osteochondral defect'. The abbreviation is also used of 'osteochondritis dissecans'.

Osteochondrosis dissecans
Knee joint in a juvenile, showing a dark area of osteochondritis dissecans damage in the bone and cartilage of the femur.

 

What is an osteochondral defect?

An osteochondral defect is a circumscribed area of joint damage, where the rest of the joint is mostly in good condition, such as might follow from a blow on the knee.

 

What is osteochondritis dissecans

Osteochondritis dissecans is a particular type of osteochondral defect caused by a failure of blood supply to a small area, which local loosening of a small chunk of bone and cartilage in a similar way

Synonyms: 
osteochondritis dissecans
osteochondral defect
-

Common joint surface problems in the knee

A quick overview of the problems one sees in the white joint cartilage at the end of the bones in the knee joint.

-