TSH waxay u taagan tahay hoormoonka kiciya thyroid-ka (thyroid-stimulating hormone). Thyroid-ka kama samaysmo: waxay ka timaaddaa qanjirka pituitary-ga ee salka maskaxda ku yaal, shaqadeeduna waa inay u sheegto thyroid-ka qoortaada ku yaal inta hoormoon thyroid ah (T4 iyo T3) uu sameeyo.
Waxay u shaqaysaa sida kulbeeg (thermostat). Marka hoormoonka thyroid-ku yaraado, pituitary-gu wuxuu kor u qaadaa TSH si uu thyroid-ka u riixo. Marka uu bato, wuxuu hoos u dhigaa TSH. Taasi waa sababta natiijadu u muuqan karto mid rogan: TSH sare badanaa waxay ka dhigan tahay thyroid gaabis ah, TSH hoose-na badanaa waxay ka dhigan tahay thyroid firfircooni xad-dhaaf ah leh.
Maadaama TSH ay ka jawaabto isbeddellada yaryar ka hor T4, waa baaritaanka thyroid-ka ugu horreeya uguna dareenka badan. Baaritaanka thyroid profile wuxuu badanaa ku daraa free T4, mararka qaarna free T3, thyroid antibodies-ka (anti-TPO) waxay muujiyaan in difaaca jidhku weerarayo thyroid-ka iyo in kale.



