Trisomy 13


What is pseudotrisomy 13 syndrome?

Pseudotrisomy 13 syndrome is also called holoprosencephaly-polydactyly syndrome. Babies with pseudotrisomy 13 syndrome often have holoprosencephaly which means that their brains have not developed properly. The brain is supposed to divide into two halves, but this distinction does not completely finish in people with holoprosencephaly. People with polydactyly have more than 10 fingers or toes.

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