Figure 4

Figure 4

 A proposed algorithm for investigating the genetic basis of congenital hypothyroidism. AHO, Albright hereditary osteodystrophy; CH, congenital hypothyroidism; GNAS, stimulatory G protein α subunit gene; NIS, sodium-iodide symporter gene; PAX-8, human Pax-8 gene; PDS, Pendred syndrome gene; TFTs, thyroid function tests; TG, thyroglobulin gene; THOX2, thyroid oxidase 2; TIOD, total iodide organification defect; TITF-1, human TTF-1 gene; TITF-2, human TTF-2 gene; TPO, thyroid peroxidase gene; TSHR, TSH receptor gene; USS, ultrasound scan.