Molecular and phenotypic characterization of ring chromosome 22.

Abstract excerpt

We performed a phenotype study of 35 individuals (19 males, 16 females) with ring chromosome 22 or r(22) with a mean age of 10 years. In common with other studies, a phenotype of moderate-to-profound learning difficulties and delay or absence of speech affected all individuals with the exception of the case with the smallest deletion. Autistic traits were significantly associated with r(22), as shown by an autism...

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