Fig. 1

Consecutive CT findings from at baseline to preoperative point. a–d An enhanced mass lesion measuring 33 × 27 mm on the pancreatic body with encasement of the CHA and narrowing of the splenic vein at the initial visit. e–g The tumor shrank to 25 × 10 mm in diameter with the encasement of the CHA and narrowing of the splenic vein after four cycles of liposomal irinotecan + 5-FU/LV chemotherapy regimen administered. h–j The tumor shrank to 18 × 7 mm in diameter with the encasement of the CHA. The narrowing of the splenic vein disappeared after 11 cycles of liposomal irinotecan + 5-FU/LV were administered