an 8-year old boy with a small goiter , normal basal metabolic rate ( bmr ) , and elevated serum thyroid hormone levels ( thyroxine [ t ( 4 ) ] 19.5 mug per 100 ml , free t ( 4 ) 4 ng per 100 ml , triiodothyronine [ t ( 3 ) ] 505 ng per 100 ml ) was studied .
C0018021
goiter
C0040165
thyroxine