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pubmed:abstractText |
We diagnosed a 22-year-old man with psychomotor retardation, rare seizures, hyperglycinemia, and hyperglycinuria as an atypical variant of nonketotic hyperglycinemia (NKH). Despite this clinical phenotype and a CSF/plasma ratio confirming a mild variant, measurement of hepatic glycine cleavage activity and the P-protein component indicated the more severe neonatal variant.
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