MAMMARY GROWTH IN MALE MICE FED DESICCATED THYROID1

Abstract

The mammary glands of intact [male] mice fed desiccated thyroid mixed with their food (1.5 mg. per kg.) showed proliferation of the ducts and hyperplastic end buds. Castrated [male] mice similarly treated showed no mammary growth. The adrenal glands of the thyroid-fed, intact or castrated [male] mice were greatly increased in size and the kidneys and livers were also larger than in the controls. The amts. of desiccated thyroid consumed were insufficient to reduce the increase in body wt. below that of the controls.