Fig. 1

Enhanced computed tomography findings. a CT findings at 1 year after lobectomy for primary lung cancer. A 20-mm cystic tumor was detected on the pancreatic head, with no tumor on the pancreatic body. b CT findings at 2 year after lobectomy. The cystic tumor on the pancreatic head gradually increased from 20 mm to 37 mm and showed a contrasted solid nodule inside the cystic tumor. The cystic tumor was also indicated at the pancreatic body