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A supracondylar humerus fracture is a fracture of the distal humerus just above the epicondyles. While relatively rare in adults it is one of the more common fractures to occur in children and is often associated with the development of serious complications. ==Classification== It may be of a flexion type or an extension type, depending upon the displacement of the distal fragment of bone. Extension type: The most common type, accounting for 95%〔http://www.wheelessonline.com/ortho/pediatric_supracondylar_fractures_of_the_humerus〕 of all supracondylar fractures. The distal fragment is displaced posterior. ''Flexion type'': The least common variety (5%), where the distal fragment is displaced anterior relative to the proximal segment. ''Displacements'': The displacements may present in one of a number of ways: posterior shift, posterior tilt, lateral or medial shift, proximal shift or internal rotation. Supracondylar fractures can also be categorized by the Gartland classification system, based upon the degree of displacement of the distal fragment. According to a website for orthopedic surgeons, “This is the most common elbow fracture in children, about 60% of fractures in children. It is most common in children <10, peak incidence is between the ages of 5-8 years of age. Primarily in children who are around age 7 years, which is often a period of maximum ligamentous laxity; therefore, the elbow hyperextends when the child tries to catch himself or herself during a fall. During the hyperextension process, the olecranon (elbow bone) process is forced against the weaker, immature metaphyseal bone of the distal humerus, producing the typical extension-type supracondylar fracture”.〔http://www.eorif.com/Pediatrics/supracondhumerus.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Supracondylar humerus fracture」の詳細全文を読む スポンサード リンク
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