MRI Accuracy and Tumor Size

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MRI Accuracy and Tumor Size

by shanie1017 on Thu Dec 07, 2017 09:56 AM

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Hi.  I'm wondering what your experience has been with the accuracy of MRI results.  My dad was diagnosed with bile duct cancer in October 2016 and has been on chemo since January 2017.   During the first 6 months (from October 2016 to March 2017), his tumor size remained the same.  He's been getting an MRI every few months, and according to the MRI results, the "mass" is nearly doubling in size each time he gets an MRI.  It also means that the "mass" has gotten bigger and bigger AFTER he began chemo.  From March 2017 to November 2017, it went from 26 mm to 49 mm to 89 mm. 

If the MRI results show that the "mass" is increasing at such a rapid pace, is it the tumor itself that's growing, or could the increase in size be caused by inflammation, accumulation of dead cancer cells, etc.?  Even my dad's oncologist said he wasn't sure if it was the tumor itself that was growing or if the increase in size was caused by inflammation, etc.  It's very confusing.  Anyone have any experience with this? 

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