We report two cases of Schloffer tumor that required resection after radical colon cancer surgery because of suspected lymph node recurrence on contrast-enhanced (CE) CT and 18F-FDG-PET/CT.Case1 is 69-year-old man with sigmoid colon cancer pStage IIA and case 2 is a 67-year-old male with descending colon cancer pStage IIIB.