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F-18 FDG PET/CT images. a Increased splenic FDG uptake (SUVmax 3.8) exceeding hepatic FDG uptake (SUVmax 2.2) in a 74-year-old woman with intrahepatic cholangiocarcinoma. The spleen-to-liver ratio was 2.45. The SUVmax of the primary mass was 7.5. b Splenic FDG uptake (SUVmax 2.7) lower than hepatic FDG uptake (SUVmax 3.8) in a 57-year-old man with intrahepatic cholangiocarcinoma. The spleen to liver ratio was 0.71. The SUVmax of the primary mass was 13.5
