Hypothyroidism, Congenital, Nongoitrous, 5, is also known as chng5. An important gene associated with Hypothyroidism, Congenital, Nongoitrous, 5 is NKX2-5 (NK2 Homeobox 5). Affiliated tissues include thyroid and heart, and related phenotypes are hypothyroidism and elevated circulating thyroid-stimulating hormone concentration