The radiologist might have just put that in there based on the exam your referring doctor did. Overall, you're looking pretty good, with the exception of that one kidney stone (may or may not cause problems in the future), an inguinal hernia (very common), and that area of low attenuation. That could be a lot of different things, some more benign than others, but they had trouble telling what it was because you didn't have the contrast.
What they didn't see was inflammation of the intestines or any gallstones, which is good.
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