urea cycle disorder

urea cycle disorder

Any disorder in which the body is unable to excrete waste nitrogen–ammonia–resulting in mental and behavioral dysfunction, coma, death

urea cycle disorder

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UCD

Any of six inherited disorders in which an enzyme in the urea cycle is missing or nonfunctional, resulting in the accumulation of excess ammonia in the bloodstream. Lethargy, failure to thrive, nausea and vomiting, encephalopathy, and coma are common symptoms, esp. in newborns.