先天甲状腺功能减低症(简称先天甲低),一般分为非腺肿型和腺肿型两类。前者散发出现,甲状腺不肿大,甚至无明显的甲状腺组织。以往认为非腺肿型甲低无遗传性。最近作者遇到同胞兄弟2人,均患先天甲低,经甲状腺同位素扫描,证实甲状腺缺如。例1:男,6岁5个月,因疑患甲低住院。当时 Congenital hypothyroidism (referred to as congenital hypothyroidism), are generally divided into two types of non-edema and adenoid. The former sporadic appears, the thyroid does not swollen, or even no obvious thyroid tissue. In the past that hypoplasia type A low hereditary. Recently the author met two brothers and siblings, both suffering from congenital hypothyroidism, thyroid isotope scanning, confirmed thyroid absence. Example 1: Male, 6 years old 5 months, hospitalized for suspected hypothyroidism. then