Fig. 4

Pathological findings of the pancreatic tumor. a Overview of the tumor (hematoxylin and eosin staining). The tumor shows a clear margin with normal pancreatic tissue. Of note, the tumor completely contacts the main pancreatic duct (white arrowhead). b High magnification of a. Tumor cells show clear cytoplasm, diagnosed as clear cell renal cell carcinoma. Black bar is 50 μm. c Elastica van Gieson staining. The tumor has a fibrous capsule showing capsular invasion (black arrowheads). Black bar is 100 μm