智力低下涉及多种病因,有的伴有骨改变,从骨的某些特征性变化可推论其可能的病因,有些智力低下疾病(如先天性遗传疾思),智力低下越严重,其它系统的残缺(包括骨骼系统的异常)发病率也越高,表现也越严重。因此,了解骨改变的情况,不但可帮助儿童智力低下的病因诊断,亦可估计其预后和严重程度。本文试从骨改变的角度结合临床其它表现对其病因诊断问题予以探讨。一、从病因上全面考虑其可能性造成智力低下的病因极其复杂,除生物因素外,尚有社会文化教育因素,而多数严重智力低下属先天性遗传疾患。长(火田) Mental retardation involves a variety of causes, some accompanied by bone changes, some of the characteristic changes from the bone can be deduced its possible causes, some mental retardation (such as congenital genetic disease thinking), the more serious mental retardation, other systems Disability (including skeletal system abnormalities) the higher the incidence, the more serious the performance. Therefore, understanding the changes of bone can not only help children diagnose the etiology of mental retardation, but also estimate their prognosis and severity. This article attempts to explore the etiological diagnosis from the perspective of bone changes combined with other clinical manifestations. First, from the etiology of the full consideration of its possible causes of mental retardation is extremely complicated, in addition to biological factors, there are social and cultural education factors, and most of the serious mental retardation is congenital genetic disorders. Long (fire)