[Prolactinemia in primary hypothyroïdism : basal and dynamic studies--signification of galactorrhea associated with myxedema (author's transl)].

PRL and TSH were measured by radioimmuno-assay in 14 persons wth myxoedema aged 16 to 65 years. Three of them had galactorrhea. In 13 patients the circadian rhythm of PRL was studied, and in 8 patients PRL was measured after TRH administration. All these patients have a high value of serum TSH, with a mean value +/- SEM of 29,4 (24,3 - 35,6) mU/ml. Values of serum PRL were comprised in normal ranges with a mean value +/- SEM of 126(196 - 238) mU/ml. The circadian rhythm of PRL is not altered, since mean values of serum PRL are more elevated at 4 am than 8 am with highly statistical significance. After THR administration the PRL response is normal or exaggerated.