Fig. 1
A 65-year-old woman, who had undergone preoperative PTBD before left hemihepatectomy due to hilar cholangiocarcinoma, was troubled with right flank pain. Serum CEA and CA 19–9 levels were within the normal range. Contrast-enhanced abdominal CT was done and interpreted as no definite abnormality at the time. Following F-18 FDG PET/CT revealed a small focal hypermetabolic lesion (SUVmax 10.4) in the right ninth intercostal space (a, b, c), where PTBD catheter had been inserted (d) 17 months earlier. On a retrospective review of the previous CT (e, f), a small enhancing nodule was noted at the corresponding site of the hypermetabolic lesion on F-18 FDG PET/CT. CT-guided biopsy was performed on this site