患儿，女，９ａ，以双手环小指进行性屈曲４ａ住院。近４ａ来发现患儿双手环小指渐屈曲，伸不展，与同龄儿手指不同，故来诊。查体：精神可，发育正常，心肺无殊，双手食中环小指均不能完全被动伸直，有屈曲挛缩，尤以环小指为重，双手发育较同龄儿稍差，掌远端未触及小结节， Children, women, 9a, with a double flexor little finger ring flexion 4a hospitalization. Nearly 4 years to find children’s hands ring little finger flexion, extension is not the same, with the same age fingers different, so the clinic. Physical examination: the spirit can be normal development, heart and lungs are no special, both hands of the food can be completely passive ring finger straight, buckling contracture, especially the ring finger for the most important, hands less developed than their peers, the palm has not touched the distal end of the summary Festival,