Brief Answer: more information will be needed Detailed Answer: A CT scan with contrast is helpful to evaluate the abdomen. The fact that there is a "liver mass" that big is concerning, however it depends on how the contrast goes into the liver mass. it could be something benign (such as a simple liver cyst or a liver hemangioma - for which no treatment is usually needed). Other alternatives diagnoses are other types of tumors, including liver cancer (most commonly hepatocellular carcinoma), and liver metastasis (cancer spread from other organs). The findings of the duodenum are non specific and i would not worry about unless you do have vomiting. The bile duct is dilated, but the CT scan is not that good to look at this area (for this purposes a better study is an MRI, with MRCP technique). The calcified aorta is fairly common with age. The rectosigmoid colon thickness seen is usually because the colon is collapsed sometimes with no air. very rarely it is due to a polyp or tumor. If you have had a colonoscopy within the past few years I would not worry about it, otherwise i would suggest you being seen by a gastroenterologist for a colonoscopy. I would discuss with your doctor about the next step based on the impression of the radiologist. if he is concerned about a tumor, then you will likely need an MRI, and some blood tests to check tumor markers. If still unsure about what's going on in the liver you will need a liver biopsy. Hope that helped, let me know if you have any further questions or concerns

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