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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 ]
[3] [5] The third (middle finger) metacarpal head has been reported to be the most common site of necrosis. [6] Though osteonecrosis is a fairly common condition, many cases of avascular necrosis of the metacarpal head go without being diagnosed. This is because presentation of symptoms is variable depending on the patient.
In 2003, [9] [10] reports surfaced of the increased risk of osteonecrosis in patients receiving these therapies concomitant with intravenous bisphosphonate. [11] Matrix metalloproteinase-2 may be a candidate gene for bisphosphonate-associated osteonecrosis of the jaws, since it is the only gene known to be associated with both bone ...
Osteonecrosis of the jaw (ONJ) is a severe bone disease (osteonecrosis) that affects the jaws (the maxilla and the mandible).Various forms of ONJ have been described since 1861, and a number of causes have been suggested in the literature.
Preiser disease, or avascular necrosis of the scaphoid, is a rare condition where ischemia and necrosis of the scaphoid bone occurs without previous fracture.It is thought to be caused by repetitive microtrauma or side effects of drugs (e.g., steroids or chemotherapy) in conjunction with existing defective vascular supply to the proximal pole of the scaphoid.
Specifically, Kienböck's disease is another name for avascular necrosis [2] (death and fracture of bone tissue due to interruption of blood supply) with fragmentation and collapse of the lunate. This has classically been attributed to arterial disruption, but may also occur after events that produce venous congestion with elevated interosseous ...
[16] [18] Before the introduction of steroid replacement, the mortality from pituitary apoplexy approximated 50%. [4] The name of the condition was coined in 1950 in a case series by physicians from Boston City Hospital and Harvard Medical School. [1] [19] The term "apoplexy" was applied as it referred to both necrosis and bleeding into ...
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 .