[Congenital or neonatal hypothyroidism with filter-paper levels of TSH less than 50 microU/ml. Conclusions on the detection strategy in France].

Between 1979 and 1983, 959 hypothyroid infants were discovered by the neonatal screening program in France. Sixteen had filter-paper TSH levels between 30 and 50 microU/ml: one was athyroid, ectopic thyroid in 5,10 had thyroids in place. These latter 16 cases argue for a second TSH control-value for filter paper TSH values between 30 and 50 microU/ml.