Click on images for larger views. There is diffuse follicular epithelial hypertrophy and hyperplasia. Relatively few follicles have discernable lumens or colloid production.
Follicular epithelium is hypertrophic and vacuolated.
Follicle colloid is globular and sparce. Somewhat serpentine arrangements of arteriolar smooth muscle cells represent portal arteriolar hyperplasia. Portal veins are not discernable. Scattered hepatocytes contain brown pigment. Central veins are inconspicuous.