Fig. 1
From: Papillary thyroid carcinoma with pleomorphic tumor giant cells in a pregnant woman – a case report
Photomicrographs of the PTC-PC case. a Routine sections of the conventional PTC area demonstrate clear-cut PTC-related nuclear features. b Focal tumor necrosis (central) within the conventional PTC area (left and right). c-d Focal areas with exaggerated pleomorphism and bizarre giant cells at 100× and 400× magnifications respectively. e Retained TTF1 immunoreactivity within the pleomorphic areas. f Markedly increased Ki67-labeling index within the same area (30% positive nuclei using immunohistochemistry with an anti-Ki-67 antibody)