Maternal transmission of a mild Coffin-Siris syndrome phenotype caused by a SOX11 missense variant.

ABSTRACT: Here we report for the first time on the maternal transmission of mild Coffin-Siris syndrome (CSS) caused by a SOX11 missense variant. We present two sisters with intellectual disability and muscular hypotonia born to non-consanguineous parents. Cogan ocular motor apraxia was present in both sisters. Body measurements were in a normal range. The mother and both daughters showed hypoplastic nails of the fifth toes. A missense variant in SOX11 [c.139 G > A; p.(Gly47Ser)] in both sisters and their mother was identified. Since 2014, variants in SOX11 are known to cause mild CSS. Most described patients showed intellectual disability, especially concerning acquired language. All of them had hypoplastic nails of the fifth toes. It is of note, that some of these patients show Cogan ocular motor a

SUBMITTER: Hanker B 

PROVIDER: S-EPMC8738766 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature