Figure 4

Histopathological images of samples taken during endoscopic ultrasound-guided fine-needle aspiration. (A) The tumor cells with round nuclei show pseudopapillary growth (hematoxylin and eosin stain; original magnification, ×4). Immunohistochemically, the tumor cells stained positive for CD10 (original magnification, ×10) (B), progesterone receptor (original magnification, ×10) (C) and vimentin (original magnification, ×10) (D).