Fig. 2

Macroscopic and histopathological findings. a, b Macroscopic images of the resected pancreatic tumor showed a white to tan solid mass in the pancreatic tail (white dashed circle). c Histologically, neoplastic cells infiltrate forming small to medium sized glands, and in some area, luminal formation becomes inconspicuous. Necrosis are also obvious in the neoplastic tissue (black arrows). d The neoplastic cells are mainly composed of columnar cells with clear foamy cytoplasm and apical brush border-like zone. Staining with HE. Original magnification: × 40 (C) and × 200 (D)