AVN

Question 1

What is AVN?

Answer 1

avascular necrosis of bone mainly in adults

Question 2

What can AVN be secondary to?

Answer 2

fractures eg of femoral neck

Question 3

What can AVN be caused by abuse of?

Answer 3

alcohol and steroid (related to alteration of fat metabolism)

Question 4

What other conditions can cause AVN?

Answer 4

sickle cell, thrombophilia, antiphospholipid

Question 5

Rare cause of AVN?

Answer 5

Caisson’s disease/decompression sickness after deep sea diving

Question 6

Treatment of AVN?

Answer 6

deoends on stage, if articular surface has no collapsed, drilling can be done to decompress
If it has collapsed, joint replacement needed
If foot/ankle, consider fusion