Fig. 3

a Gross pathology (sections). Two separated neoplastic tumors in the left thyroid lobe: follicular thyroid carcinoma (F) (at the top) and papillary thyroid carcinoma (P) (at the bottom). b Two separated morphologically distinct neoplastic tumors in the left thyroid lobe: minimally invasive follicular thyroid carcinoma (F) (to the left) and papillary thyroid carcinoma (P) (to the right) (Hematoxylin and Eosin, original magnification 40x). c Cytonuclear features of papillary thyroid carcinoma, including nuclear overlapping, nuclear grooves (↓) and nuclear clearing (→) (Hematoxylin and Eosin, original magnification 200x). d Aberrant strong apical membranous (brown coloured) HBME expression in the papillary thyroid carcinoma (original magnification 200x). e Capsular invasion (C) in the follicular thyroid carcinoma (*) (Hematoxylin and Eosin, original magnification 100x). f Angioinvasive growth (V) in the follicular thyroid carcinoma (*) (Hematoxylin and Eosin, original magnification 100x)