This volume presents the proceedings of a symposium on the "Control of the thyroid gland regulation of its normal function and growth," held at the National Insti- tutes of Health, Bethesda, Maryland on March 20 and 21, 1989. Our motivation for the organization of this symposium was the fast development in re cent years of our understan- ding of the regulation of the thyroid - and the progress in the field of cell regulation in general - which have led to profound modifications of our view of the control of the thyroid. Not so many years aga the thyroid was thought to be controlled by one...