“…At 24 hours the PB1311 in the serum is measured. This In order to ascertain whether a patient on thyroid medication is actually suffering from thyrogenic myxoedema, a thyrotrophin stimulation often has to be done, as in these patients the thyroid gland very seldom takes up iodide, even in the absence of myxoedema, because the glandular function is inhibited by the treatment (1,6,14). As is well-known, this stimulation test is also of interest in differentiating between thyrogenic and pituitary myxoedema.…”