[Screening of newborn infants in Norway for severe metabolic disease].

The objective of neonatal screening for phenylketonuria and congenital hypothyroidism is early diagnosis and initiation of treatment to prevent brain damage and mental retardation. We present the results of the Norwegian national neonatal screening programme for phenylketonuria and congenital hypothyroidism. Screening for phenylketonuria based on serum phenylalanine determinations started in 1967 and covered the whole country in 1978. National screening for congenital hypothyroidism started in 1979. One hundred children with phenylketonuria and 280 children with a strong indication of congenital hypothyroidism have been detected up to 1 October 1994. Screening-related challenges and principles of treatment are discussed.