based on thyroid 131i scan or 131i uptake , 52.5 % had no demonstrable thyroid tissue except one with hypoplasia ( group i , n = 42 ) , 25 % had ectopic thyroid ( group ii , n = 20 ) , and 22.5 % had normal or enlarged thyroid gland ( group iii , n = 18 ) .
C0040132
thyroid
C0018021
enlarged thyroid