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Avascular necrosis (AVN), also called osteonecrosis or bone infarction, is death of bone tissue due to interruption of the blood supply. [1] Early on, there may be no symptoms. [ 1 ] Gradually joint pain may develop, which may limit the person's ability to move. [ 1 ]
Pain can often be severe, especially if teeth and/or a branch of the trigeminal nerve is involved, but many patients do not experience pain, at least in the earlier stages. When severe facial pain is purported to be caused by osteonecrosis, the term NICO, for neuralgia-inducing cavitational osteonecrosis , is sometimes used, but this is ...
Exposed and necrotic bone or a fistula that probes to bone in patients with pain, infection, and one or more of the following: exposed and necrotic bone extending beyond the region of alveolar bone (i.e., inferior border and ramus in the mandible, maxillary sinus and zygoma in the maxilla) resulting in pathologic fracture, extra-oral fistula ...
Spontaneous osteonecrosis of the knee is the result of vascular arterial insufficiency to the medial femoral condyle of the knee resulting in necrosis and destruction of bone. It is often unilateral and can be associated with a meniscal tear .
Pain, which is severe, throbbing and deep-seated and often radiates along the nerve pathways. Initially fistula are not present. Headache or facial pain, as in the descriptive former term "neuralgia-inducing" (cavitational osteonecrosis). Fibromyalgia. Chronic fatigue syndrome. Swelling.
The pathology of avascular necrosis followed by revascularization and bony remodeling of the femoral head in the dog certainly suggests a vascular etiology, though the cause of the condition is not completely understood. [40] Hip pain is usually seen by the age of 6 to 8 months. [41] The disease is bilateral in 12–16% of cases. [42]
Osteoradionecrosis (ORN) is a serious complication of radiation therapy in cancer treatment where radiated bone becomes necrotic and exposed. [1] ORN occurs most commonly in the mouth during the treatment of head and neck cancer, and can arise over 5 years after radiation. [2]
A major presentation is painful thigh or leg swelling. [11] Bone: Infarction of bone results in avascular necrosis. Without blood, the bone tissue dies and the bone collapses. [12] If avascular necrosis involves the bones of a joint, it often leads to destruction of the joint articular surfaces (see osteochondritis dissecans).