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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


(sar'kō-si-nē'mē-ă), [MIM*268900]
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.
Synonym(s): hypersarcosinemia
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The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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