What Causes Aseptic Necrosis?

Embolism

An embolism is anything that causes a blockage in a blood vessel. This can mean a blood clot, a bubble of gas or air, a ball of fat or even an object that is foreign to the body. Unless they are deliberately induced to treat a disease, an embolus needs to be considered a serious medical condition if not a medical emergency. An embolus in the brain or heart can lead to stroke while an embolus in a vein can cause a dangerous blockage in the lung. Because the blood vessel is blocked, it is difficult for the bone near the blockage to receive the amount of blood that is necessary for growth and normal functioning.