Thyroid follicular cell hyperplasia.
Mean proportions of follicular cell layers per thyroid gland of alligators from three sites in Florida. Merritt Island = black, Lake Woodruff = white, Lake Apopka = gray. A. Neonatal alligators. (AP: N = 16; MINWR: N = 11; LWNWR: N = 13) B. Juvenile alligators (N = 18 for all sites). Error bars are ± SEM. Letters represent significant differences among sites within follicular cell layer classifications.