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For patients with large, partially or nearly obstructing rectal cancers, how do you sequence TNT in order to avoid complete obstruction and surgical diversion?

Do you find that starting with chemoradiation increases the risk of complete obstruction secondary to transient tumor inflammation, or do you favor starting with chemoradiation for a faster response?
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For patients with nearly obstructing rectal cancers, how do you sequence TNT in order to avoid obstruction and surgical diversion?

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4 Answers
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Radiation Oncology · University of North Carolina at Chapel Hill
Answered on

I personally favor starting with RT/chemo, but starting with chemo can work well. The more important issue is the side questions. First, there is a huge difference between a lesion that is large and one that is nearly completely obstructing. Unfortunately, many endoscopists use the term "obstructing...

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Medical Oncology · Cancer Center Overlook Hospital
Answered on

Coming from the med-onc perspective, I agree with Dr. @Dr. First Last's assessment of “obstruction” based on clinical symptoms while also trusting the discussion with the endoscopist. Personally, I prefer to start with chemotherapy. I can make individual adjustments to the regimen to prepare in case...

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Radiation Oncology · Sylvester Comprehensive Cancer Center
Answered on

At our center, we treat very advanced cases routinely. CRT or chemo can yield a worsening symptomatic obstruction. If symptomatic upfront or impending symptomatic, I think a diverting ostomy is the way to go. From there, I still prefer CRT upfront than chemo (but never mind if one or two cycles of c...

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Radiation Oncology · Retired
Answered on

Agree with the above. The obstructive symptoms will respond quickly in many patients with the institution of neoadjuvant treatment. However, it is not uncommon to have a patient who for various reasons does not seem to get started expeditiously on treatment. For those cases, referral for upfront div...

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