What is avascular necrosis of hip and knee?

Bone Destruction. Avascular necrosis means there is no blood getting to a particular body part. Our body parts need blood to survive, including bones (bones are living tissue). Necrosis refers to the dying of cells that make up that body part. Avascular necrosis of the hip & knee means there is no blood getting to them & they are being destroyed.
Bone death. Avn is caused by a disrupted blood supply to the bone. Bone is living tissue. Without a proper blood supply it dies.
Usually is dead bone. Avascular necrosis occur when the ciculation to a particular area of the bone is interrupted.Must common areas are the hip joint(the ball) and the knee.However can occur in any bone that the blood supply have being interrupted.Usual culprits are trauma(fractures or dislocations)diseases such as sicle cell .Dr p seni.
Lack of blood supply. When the bones that form the joint lose their blood supply, for one reason or another, that is called avascular necrosis.
Bone death. Avascular necrosis is when the bone is no longer receiving adequate blood supply, usually due to a fracture injuring the blood vessels. When this occurs, the bone dies. This is common with hip fractures and once this occurs; the hip needs to be replaced. I'm sure this can occur with the knee but it is much less common.

Related Questions

Avascular necrosis of femur at knee? Can it happen there?

Yes. While avascular necrosis at the hip is most common, it can happen many other places; including in the femur at the knee. Read more...
Yes. There are a variety of sites that can be involved: knee, hip, shoulders and also. Ankles, feet. Hands, spine and wrists. It is also descrfibed in the jaw - but this appear to differ from the other types. The most common site in the knee is the inner or medial femoral condyle. Associations include: alcohol abuse, steroid usage (usually high doses over a long period), sickle cell, etc. Read more...
Yes. It's a very common location for it. See an orthopedic knee surgeon for proper care. Read more...

What exacting is avascular necrosis? I have it in my legs, knees.

Lack of blood supply. Avascular necrosis occurs when blood supply to an area of bone is cut off, for example your knee. Blood carries oxygen & nutrients to all parts of your body, including bone. Without blood supply that part of the bone "dies". This is a serious condition especially if it affects the femoral area of the hip. Read more...

I've got avascular necrosis of hip. Today I fell on that hip. Could I've got fractured it?

It is always possibl. AVN typically doesn't put you at risk for increased fracture, just Arthritis. I would;t typically expect a 41 year old male to ever have a hip fracture from a fall. IF you have AVN the joint certainly could have flared up if you are in pain. Outside of that, if you cannot walk or bear weight I would certainly see an ortho doc and get an X-ray. Read more...
Unbelievable. Why would you ask a doctor who cannot examine the hip? If you have significant pain then go to the ER and have an exam and x ray. . Read more...