endocrine/exocrine glands
N |
• mice exhibit normal serum thyroid-stimulating hormone (TSH) and thyroxine (T4) levels
|
neoplasm
N |
• mice treated with the goitrogen 6-propyl-2-thiouracil (PTU) for up to 20 weeks of age develop benign goiters and increases in TSH but do not develop thyroid cancer
|