AVASCULAR NECROSIS OF THE FEMORAL HEADS. Flashcards
1
Q
What is AVN ?
A
Loss of blood supply to the femoral heads.
2
Q
What causes AVN?
A
Trauma
smoking
Alcoholism.
Steroid use.
3
Q
What are the radiographic appearances of AVN ?
A
Early stages will be osteopenia.
Patchy sclerosis
Rim calcification and flattening.
Cresent sign.
4
Q
Where in the hip does AVN usually present first ?
A
The superior aspect.
5
Q
What is the crescent sign in relation to AVN ?
A
in the weakened area of bone Microfractures occur.
