an inborn error of metabolism due to a defect of the enzyme that breaks down sarcosine, resulting in elevated levels of sarcosine in the blood. Clinical manifestations include poor feeding in an infant with failure to thrive and developmental delays; however, no consistent clinical syndrome has been reported. Called also hypersarcosinemia.
A disorder of amino acid metabolism due to deficiency of sarcosine dehydrogenase, causing the sarcosine level to rise in blood plasma and be excreted in the urine; some affected infants fail to thrive, are irritable, may have muscle tremors, and have retarded motor and mental development; autosomal recessive inheritance.
hypersarcosinemia/hy·per·sar·co·sin·e·mia/ (-sahr″ko-sĭ-ne´me-ah) sarcosinemia.