[Comparison between a shortened TRH-TSH test and thyroid suppression test in the diagnosis of hyperthyroidosis]

In a selected group of fifty-one persons suspected to be hyperthyroid the comparison between a shortened variant of TRH-TSH stimulation test and thyroid suppression test was made. In patients whose other functional tests gave no univocal results, the agreement between suppressibility of radioiodine uptake and TSH response in 90,2% of cases could be established. High degree of correlation between both parameters (coefficient V = 0.791) permits to regard these tests as practically equivaluablein giving evidence of dysregulation between pituitary and thyroid gland. In persons with TSH-dependent thyroid function, however, no correlation between numerical values of radioiodine uptake and TSH concentrations after stimulations was found.