[Follow-up studies of patients with negative TRH test and normal thyroid hormone levels].
The aim of the study was to assess the clinical significance of the association of a negative TRH-test with normal thyroid hormone levels. Therefore, we repeated the investigation in 63 patients one year after the first examination. In 6 patients (10%) hyperthyroidism had developed. Euthyroid autonomy was diagnosed in 11 patients (17%). A prolonged normalisation period of the pituitary-thyroid regulation after having discontinued the thyroid hormone drugs was found in 7 patients (11%). In 40% of the patients the TRH-test remained negative and in 22% of the patients the TSH-response became positive without any known reason. The findings show that a negative TRH-test and normal thyroid hormone levels do not necessarily imply subclinical hyperthyroidism.
Abteilung für Nuklearmedizin, Städtischen Kliniken Chemnitz.
H
H
Döge
O
O
Hübner
K
K
Kempe
A
A
Riedel
W
W
Ortweiler
D000328:Adult; D000368:Aged; D005067:Euthyroid Sick Syndromes / Q000097:blood / Q000175:diagnosis; D005260:Female; D005500:Follow-Up Studies; D006111:Graves Disease / Q000097:blood / Q000175:diagnosis; D006801:Humans; D006980:Hyperthyroidism / Q000097:blood / Q000175:diagnosis*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D013960:Thyroid Function Tests; D013963:Thyroid Hormones / Q000097:blood; D013972:Thyrotropin / Q000097:blood*; D013973:Thyrotropin-Releasing Hormone
D013963:Thyroid Hormones; D013973:Thyrotropin-Releasing Hormone; D013972:Thyrotropin