Genetic problems are thought to cause this syndrome although the specific gene(s) remain to be discovered. The pattern of inheritance has not been determined but in most cases it seems sporadic, that is to say, there is no family history in preceding generations/siblings.
Children with Russell-Silver syndrome are born small and generally achieve less than 5 feet at adult height. Side-to-side asymmetry is fairly common, for example a left body part may be larger than the right counterpart. This asymmetry may occur anywhere including the face. Other findings include excessive sweating, a small triangular face which makes the skull look large by comparison, inward curving 5th fingers, and pigmented skin lesions called cafe-au-lait spots.
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