23. Osteonecrosis (avascular necrosis) Flashcards Preview

Muskoloskeletal > 23. Osteonecrosis (avascular necrosis) > Flashcards

Flashcards in 23. Osteonecrosis (avascular necrosis) Deck (14)
1

Osteonecrosis is AKA

avascular necrosis

2

osteonecrosis ( avascular necrosis) - pathology

infraction of bone and marrow

3

osteonecrosis ( avascular necrosis ) - clinical presentation

painful

4

osteonecrosis ( avascular necrosis ) - MC site

femoral head

5

osteonecrosis ( avascular necrosis ) - MC site and why

femoral head due to insufficiency of medial circumflex femoral artery

6

causes of osteonecrosis ( avascular necrosis )

mnemonic ASSEPTIC + slipped capital femoral epiphysis
Alcoholism
Sickle cell anemia
Storage ( Gaucher disease)
Exogenous / endogenous steroids
Pancreatitis
Trauma
Idiopathic ( Legg - Calve - Perthes disease )
Caisson ( " the bends" )
slipped capital femoral epiphysis

7

idiopathic osteonecrosis ( avascular necrosis ) is AKA

Legg - Calve - perthes disease

8

Legg - Calce - Perthes disease ?

idiopathic osteonecrosis ( avascular necrosis

9

X- ray of femoral head osteonecrosis ( avascular necrosis )

irregular lucencies in femoral heads with adjacent sclerosis

10

MRI of femoral head osteonecrosis ( avascular necrosis )

dark serpiginous necrotic bone

11

storage disease that causes osteonecrosis

Gausher disease

12

artery of femoral head

- branch of obturator artery medial and lateral femoral arteries

13

• What are some common causes of avascular necrosis?

ASEPTIC = Alcoholism, Sickle cell, Endo-/Exogenous steroids, Pancreatitis, Trauma, Idiopathic (Legg-Calvé-Perthes), Caisson (the bends)

14

• A woman with sickle cell disease has hip pain associated with activity. What do you suspect is going on? What is the pathophysiology?

This is likely osteonecrosis (most commonly in the femoral head) due to infarction of both the bone and marrow by sickled RBCs

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