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JOURNAL ARTICLE
REVIEW
Avascular Necrosis of the Carpal Bones Other Than Kienböck Disease.
Journal of Hand Surgery 2020 Februrary
Avascular necrosis (AVN) of the carpal bones other than Kienböck disease is a rare cause of chronic pain of the wrist. The scaphoid, capitate, and a smaller percent of lunates are at greater risk to develop AVN because of their peculiar intraosseous circulation; however, AVN has been reported in all the carpal bones. On the plain radiograph, AVN of the carpal bones may evolve through a normal radiograph, sclerosis, fragmentation, cyst formation, fracture, bone collapse, change of the carpal height, and alignment and progressive degenerative changes of the wrist joint. In the early stage of AVN, magnetic resonance imaging enhanced with gadolinium is a more sensitive and specific diagnostic tool than plain radiograph to demonstrate the bone marrow viability. Because of the rarity of case reports, the natural history of AVN of the carpal bones other than Kienböck disease is not well understood. The aims of different treatments are to prevent bone collapse, restore normal carpal height and alignment, and reduce the risk of progressive degenerative changes of the wrist joint.
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