Preferred Label : GTP Cyclohydrolase I Deficiency;
NCIt synonyms : GTPCH Deficiency;
NCIt definition : An autosomal recessive condition caused by mutation(s) in the GCH1 gene, encoding
GTP cyclohydrolase 1. It is characterized by hyperphenylalaninemia and GTP cyclohydrolase
1-deficient dopa-responsive dystonia.;