Abstract
A case of acute intermittent porphyria in a 6-year-old boy is described. Screening of urine specimens from his family showed elevated ALA and PBG levels in a 12-year-old brother. Administration of glycine (0.4 gm/kg) to the patient resulted in increased urinary output of ALA and PBG. Coproporphyrin appeared in the urine of the patient and one brother after glycine. Normal results were obtained in another brother and two control children.

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