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Why do CT scans and MRIs have a hard time seeing intrahepatic cholangiocarcinoma?

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My husband died of this last year. For a couple years, CT scans just showed increasing atrophy of the left lobe of his liver and pancreas. The third year, a colonoscopy found a palpable impingement on his transverse colon and another CT scan was done that only saw moderate atrophy of the left lobe of his liver and severe atrophy of the pancreas. The fourth year, a CT scan showed an "ill-defined mass". An MRI was done and the report was identical to the CT scan. The tumor board had a big debate on whether it was cancer or a bile duct blockage. In surgery, they were surprised to find it was stage 3 or 4 and had invaded the right lobe as well as tissue outside the liver. They didn't even get a chance to look at his pancreas. I'm just really amazed that the imaging technology cannot see inside the liver or pancreas.

submitted by /u/funkygrrl
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source https://www.reddit.com/r/Radiology/comments/12n0pve/why_do_ct_scans_and_mris_have_a_hard_time_seeing/
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