Xia-Gibbs Syndrome (‘XGS’) is a very rare, newly-discovered genetic syndrome in which the AHDC1 gene is mutated or missing.
While only a small number of people have been diagnosed with XGS so far, it is likely there are thousands affected worldwide.
XGS is a neurodevelopmental disorder, which means it affects the way the brain and nervous system function and the way the individual develops.
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