病例介绍[例1]唐××,女,6岁,住院号168995。患儿于一岁余能行走,步态始终不稳。智力正常。近年渐感行走无力。入院前4天起,两下肢不能站立及行走,伴两膝部疼痛。于1976年5月14日住院。体检:神萎,矮小,体重 Case description [Example 1] Tang × ×, female, 6 years old, hospital number 168995. Children can walk more than one year old, the gait has always been unstable. Mental normal. In recent years gradually feel weak walking. Four days before admission, both lower extremities can not stand and walk with both knees. In May 14, 1976 hospitalization. Physical examination: Shen Wei, short, weight