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Dyanclark's picture
Posts: 296
Joined: Apr 2012

My husband gets pet scans & CT scans, I am worried because they never do MRI.   Anyone have thoughts on this.  And how effective is Irinotecan on Lymph Nodes that are enlarged in groin??? 

Cea quit going up after first treatment of Irinotecan, & Xeloda.   I get the feeling this is a never ending battle.

Posts: 172
Joined: Jul 2012

I discussed MRI vs CT scans with my onc last visit because I am very concerned about the amount of radiation I've been exposed to over the past few years.  23 CT scans, 3 PET scans, bone scan, heart scan and numerous xrays....I'm a walking Chernobyl.  He is of the opinion that CT scans are better for seeing disease in the liver and lungs.  The MRI doesn't show the tumors as well in those organs.  I was a bit disheartened to hear this.  He's in complete agreement with my concerns so we will try to keep the CT's to a bare minimum....ie  only if my CEA were to trend upwards after 2 or 3 chemo treatments. 

I've done irinotecan for 4+ years and xeloda for about 3.  It's not a bad combo and seems to work well for a lot of people but yes, it certainly feels never ending.  Glad to hear the CEA stabilized!  :)

annalexandria's picture
Posts: 2573
Joined: Oct 2011

but I've had all three types of scans done, and I think the PET (for me) has been the most useful.  Sometimes it's overly sensitive, and had given false positives, but it's always been able to catch the bits that really are tumors before they get too big, which is good for my case because I'm not a chemo candidate and rely strictly on surgery at this point to keep going.  I know a few cancer patients who should be getting PET scans whose insurance won't cover it, so in that regard your husband is fortunate.  AA

Posts: 21
Joined: Apr 2007

Hello Dyanclark


The MRI(or MRT in Europe) is primarily used to detect brain tumors when it comes to cancer.

I agree with Annalexander concerning the PET (being too sensitive); for this reason some oncologists here in Germany think it is a waste of time and money. The brain uses glucose or sugar to function, the PET Tumor Tracer is also a glucose mixture, so the entire brain could be detected as one tumor because of glucose presence using the PET...this is why you need an MRI for the brain tumor detection.


Don't have any info on the other topisc

 IGWT - Charles

Maxiecat's picture
Posts: 544
Joined: Jul 2012

I am scheduled to get an MRI on my liver next week.  The dr seems to think that he can tell more from an MRI than the ct scan.  I really want a pet scan done...I will be pushing for one on my next visit.



Posts: 1170
Joined: Sep 2012

They're doing an MRI because they are determining if what they see is colorectal metastasis or something else such as granulomas or steatosis (or one hundred other possibilities).


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