History Citrullinemia was first reported in 1962 (McMurray et al 1962). Its name derives from the marked elevation of L-citrulline in blood of affected individuals. This disorder has also been called “citrullinuria” because of the increased excretion of L-citrulline in urine and “argininosuccinic acid (argininosuccinate) synthetase deficiency” to denote its enzyme defect. Heterogeneity is seen...
