Frequently asked question: How is CH diagnosed?

CH can be detected early in newborns by means of the neonatal heel prick (Guthrie test). In the blood that is taken with the heel prick, the amount of T4 and, if necessary, the amounts of TSH and TBG are determined. The possible results of the heel prick are normal, abnormal or borderline abnormal. In the case of a borderline abnormal heel prick result, it is not clear whether the values were really abnormal or not. A borderline abnormal heel prick will therefore be repeated.

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