Fig. 4From: Congenital goiter with areas of signet ring cell differentiation in a juvenile giraffe: a very rare entityHistopathological features of the thyroid. The diffuse thyroid follicles were irregular, with obvious cell proliferation, disorderly arrangement, and high-cell density. Relatively normal pink thyroid follicles are visible on the right, with pink hormones in the follicular cavityBack to article page