Fig. 2

Histological image of the ovary. A Papillary thyroid carcinoma on the upper right corner of the screen shows papillary growth. The lower left of the screen shows poorly differentiated carcinoma. Chordal arrangement, insular arrangement, and solid patterns are seen (HE: ×40). B In the part of papillary thyroid carcinoma, high-resolution image depicting the cells comprising the papillary architecture of the tumor. The nuclei of the tumor cells are large, and the nuclear fission image is inconspicuous. Ground-glass nuclei (black arrows) and coffee-bean like nuclear grooves (green arrows) are seen. (HE: ×400) C In the part of poorly differentiated carcinoma, solid patterns composed of unified cells with increased mitotic activity (arrows) (HE:×400)