Aminoaciduria

DURING the past decade many different diseases, both hereditary and acquired, have been found to be associated with aminoaciduria. Not all aminoaciduria, however, is pathologic. Normal urine contains small amounts of many amino acids, and occasionally an otherwise normal person is found to have an excretion of glycine that is considerably greater than the average.Many amino acids are increased in concentration in urine in the first two or three months of life, presumably because the renal tubular absorptive mechanisms are not fully developed at birth. Aminoaciduria is therefore particularly difficult to evaluate in the newborn period; sometimes it is . . .