Avascular necrosis, also called osteonecrosis, is bone death caused by reduced blood flow to the bone. When blood doesn't reach bone tissue, the bone begins to die and may eventually collapse. The hip is the most commonly affected joint, but avascular necrosis can also occur in the knee, shoulder, ankle, and wrist.
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Understand key symptoms, causes, diagnosis options, and treatment pathways for Avascular Necrosis (Osteonecrosis). This overview is intended for patient awareness and should be followed by specialist consultation.
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Approximately 10,000 to 20,000 new cases occur each year in the United States.
Verified medical information source from NIAMS.
Visit NIAMS ReferenceOsteopenia refers to bone mineral density that is lower than normal but not low enough to be classified as osteoporosis. People with osteopenia have weaker bones than normal and are at higher risk of developing osteoporosis and fractures. Osteopenia is a warning sign that action should be taken to improve bone health.
Bone DiseaseOsteomalacia is a condition in which the bones become soft and weak due to a defect in the bone-building process. In children, this condition is called rickets. It most commonly results from vitamin D deficiency, which impairs the absorption of calcium and phosphate needed for bone mineralization. Unlike osteoporosis (loss of already mineralized bone), osteomalacia is a failure to mineralize new bone.
Bone DiseaseOsteoporosis is a bone disease that occurs when the body loses too much bone, makes too little bone, or both. As a result, bones become weak and may break from a fall or, in serious cases, from minor bumps or even from sneezing. Osteoporosis means 'porous bone.' It is the most common reason for a broken bone among older adults.