PMC9308557_01
(a) (x40) Papillary structures typical of papillary thyroid carcinoma filling cystic spaces. (b) (x400) Papillary structures are lined by medium-sized cells with eosinophilic cytoplasm and nuclear features typical of papillary thyroid carcinoma.
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fig1
Hematoxylin and eosin-stained sections showed that the described lesions correspond to PTC characterized mainly by papillary structures "(shown in Figure 1(a))". The lining epithelium consisted of medium-sized cells with eosinophilic cytoplasm and distinctive nuclear features, namely, nuclear overlapping, chromatin clearing, irregular nuclear contour, and nuclear grooves and pseudoinclusions "(shown in Figure 1(b))".
(a) (x400) Immunohistochemical stain for IL-6 proved to be positive in cancer cells. (b) (x400) A small proportion of cancer cells displayed immunoreactivity for CEA.
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fig2
Figure 2(a))". Few cells were immunoreactive to CEA antibody as well "(shown in Figure 2(b))".