Fig. 3.
Photomicrographs of PTC lesions immunostained for PGES-1. Panels (A), (B) and (C) indicate foci of papillary arrangement, trabecular arrangement, and solid nest formation of PTC, respectively. Panel (A) is from the interface of stromal invasion, and panels (B) and (C) are from the central core of a tumor. Bars=100 µm. ABC method using DAB. ABC, avidin-biotin-immunoperoxidase complex; DAB, 3,3'-diaminobenzidine tetrahydrochloride; PTC, papillary thyroid carcinoma.