We report a case of congenital hypothyroidism (CH) with neurological and respiratory alterations due to a heterozygotic c.374-1G > A mutation of TITF1/NKX2-1. The hypothyroidism was detected using a neonatal screening protocol in which the thyroid stimulating hormone (TSH) threshold is re-set each day on the basis of within-day variability and between-day variation. In this case, the threshold on the day of the initial analysis was 8.2 mIU/L, and the measured TSH level in heel-prick blood was 8.3 mIU/L. © Journal of Clinical Research in Pediatric Endocrinology, Published by Galenos Publishing.
Barreiro, J., Alonso-Fernández, J. R., Castro-Feijoo, L., Colón, C., Cabanas, P., Heredia, C., … Pombo, M. (2011). Congenital hypothyroidism with neurological and respiratory alterations: A case detected using a variable diagnostic threshold for Tsh. JCRPE Journal of Clinical Research in Pediatric Endocrinology, 3(4), 208–211. https://doi.org/10.4274/jcrpe.448