Thyroid gland histology from neonatal alligators.

Abstract

<p>Thyroids were rated from 0 to 3 according to hyperplasia severity, hyperplasia area, and hypertrophy. A. All ratings of 1 (mild). B. All ratings of 2 (moderate). C. All ratings of 3 (severe). D. An example of follicular cell involution. F  =  follicular cell, C  =  colloid, L  =  lumen, IN  =  involution.</p