Magnetic resonance findings in a neonate with nonketotic hyperglycinemia: case report.

We present brain imaging and spectroscopy data in a neonate with a confirmed classic form of nonketotic hyperglycinemia (NKH), an autosomal-recessive metabolic disorder characterized by accumulation of glycine. To our knowledge, this is the first report of such complete analysis of the changes seen on conventional magnetic resonance imaging, diffusion-weighted imaging, and magnetic resonance spectroscopy at such an early age. The findings in a neonate are consistent with reports in older children with NKH, confirming that pathological changes typical for NKH can be seen in the first postnatal week.