Juvenile Huntington disease in an 18-month-old boy revealed by global developmental delay and reduced cerebellar volume

Abstract excerpt

Juvenile Huntington disease (JHD) is a rare clinical entity characterized by disease onset before the age of 21. JHD accounts for <10% of Huntington disease patients. Transmission of JHD is paternal in 80-90% of cases. Patients with JHD usually carry more than 60 CAG repeats within the HTT gene. We report here on a 23-month-old boy presenting with global developmental delay first noted at 18 months of age....

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