[Radionuclides in endocrinology diagnosis and experimental research]

In the article, a brief historical survey is presented of the utilization of radioactive isotopes in endocrinology and, in particular, in the 3rd Medical Clinic and Laboratory for endocrinology and metabolism. In the following, the results of our own work on the local circulation of blood in rats, its regulations and changes, are presented, i.e.: blood flow through the thyroid gland, adrenals and pituitary, local and general circulatory effects of thyroid hormones and, particularly, local blood flow through the bones in rats-changes after castration and administration of sex hormones in both females and males, possible mechanisms of the changes and functional interconnections with regard to the possible participation of the flow changes in the pathogenesis of osteopathies.