[Thyroid hormones in metastasizing prostate cancer treated with polyestradiol phosphate].

Patients with prostate cancer demonstrate a significant change in thyroid hormones when treated with estrogens after orchiectomy. Low-dose estrogen treatment for more than six months stimulates the synthesis of thyroxine-binding globulin. As a consequence, serum level of thyroxine is also increased. Serum free thyroxine is distinctly lowered by estrogen treatment while the linear ratio of thyroxine and free thyroxine is disturbed.