Fig. 5

Macroscopic and microscopic findings of the resected specimen. a Cut surface of the resected specimen showed that the tumor was white-yellowish, well-demarcated, and multinodular. There was no pancreatic parenchyma on the dorsal surface of the tumor (triangles). b Loupe image. c The tumor cells were spindle-shaped and had a palisading arrangement, forming structures called Verocay bodies in hypercellular Antoni A areas. Hypocellular areas, called Antoni B areas, were also visible. Mitosis was rarely seen. Hematoxylin–eosin staining, original magnification 200 ×