Hypothyroidism, Central, with Testicular Enlargement, also known as x-linked central congenital hypothyroidism with late-onset testicular enlargement, is related to hypothyroidism, congenital, nongoitrous, 4 and hypopituitarism. An important gene associated with Hypothyroidism, Central, with Testicular Enlargement is IGSF1 (Immunoglobulin Superfamily Member 1), and among its related pathways/superpathways is Glucocorticoid receptor regulatory network. Affiliated tissues include thyroid and testis, and related phenotypes are hypothyroidism and inappropriately normal thyroid-stimulating hormone level