Fig. 6

Microscopic findings of the resected specimen. a Viable tumor cells were observed in the replaced fibrotic tissues (blue arrowheads). Adipose degeneration was observed (red arrowheads). The distance of the dissected peripancreatic tissue margin was approximately 0.3 mm (blue arrow) and R0 resection was achieved. b Viable tumor cells with ductal formation were accompanied by vacuolar degeneration (arrowhead), and the effect grade was categorized as Evans grade IIA