Postby sean » Mon Apr 16, 2007 10:07 pm
I'm luck to have a conservative, but open treating oncologist (TO) & friendly aggressive advising oncologist (AO) in another state. When researching my stage IIA options, the AO made shared his opinion that it is possible that there are several different variants of cc that just haven't been identified yet. There are also several different regimins available (FOLFOX, FOLFIRI, CAPOX, etc) for chemo and each tumor reacts differently. Folfox appears to be the emerging gold standard for first line treatment, but if your getting no response it may be time to change. Both my TO and AO agree that some tumors are not sensitive to FOLFOX. I am only in the adjuvant setting, so I only know that if I do a full course of 12 cycles & I get a recurrence that the initial assumption will be that I need to try a different drug.
I have no idea what the time frame for measuring is for palliative care. I do know that my AO told me specifically that a CT cannot accurately show size increases or decreases of 25% or less because of the slice size used (they are not continuous - they are a spiral sampling I think) and that it is not unusual to see a 25% difference between scans because of something as small as a 2% difference in body positioning even on the same machine.
If the difference in size is less than 25% in either direction you just don't have enough evidence of any changes. Shrink is best, but no change is good news too. If a 4 mm tumor shows as 5mm that doesn't mean a thing. Make sure you talk to your TO & make sure you don't give up on oxilaplatin too soon if your talking minor size changes.
Good luck!
42 - dx Jan 3 2007 stage IIA colon
9 FOLFOX4, 3 5-FU completed Sep 24 2007
Blockage symptoms, Negative Colonoscopy, Positive PET Oct 2009
2nd Resection Oct 2009 - Suspected Local Recurrence was Negative