Ch.90 Subchonral Cystic Lesions

Question 1

Subchondral bone cysts were originally described as a manifestation of osteochondrosis complex resulting from what

Answer 1

Retained, thickened, necrotic cartilage in the physics that infolds into the subchondral

Question 2

Research in pigs and horses indicates that subchondral cysts are a result of what

Answer 2

Failure of blood supply to the epiphyseal growth cartilage and associated ischemic chondronecrosis

Question 3

How does trauma cause cystic lesions

Answer 3

Communication btw the subchondral bone and the joint

Synovial fluid access the subchondral region under pressure

Induces necrosis - cyst formation

Question 4

In CT what % of Cystic lesions had concomminat fissures

Answer 4

33%