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Results 1 - 1 of 1 for Developmental "delay," "hypotonia," musculoskeletal "defects," behavioral abnormalities
  1. Costello syndrome 
    ... with Costello syndrome include seizures, weak muscle tone (hypotonia), and a structural abnormality of the brain called a Chiari I malformation. ...
    https://medlineplus.gov/genetics/condition/costello-syndrome - Genetics