Fig. 2

Macro- and microscopic findings of the resected specimens. a Well-circumscribed vaguely lobulated mass distributed mainly in the ventral side of the pancreatic head and body. b The cut surface of the resected specimen revealed that the brownish-colored encapsulated mass was solid associated with hemorrhage and contiguous to the pancreas. c, d Histological findings showed that the tumors were composed of perivascularly arranged epithelioid tumor cells possessing clear to focally granular eosinophilic cytoplasm, round to oval nucleus and inconspicuous nucleoli, diffusely proliferated in solid nests or alveolar pattern with sinusoidal vasculatures (hematoxylin and eosin stain C ×100, D ×400)