What dose do you use for postoperative rectum boost?

Topics: Radiation Oncology • Gastrointestinal Cancers

NCCN allows a range from 5.4-9 Gy for adjuvant boost and German trial used 55.8 Gy.

What factors might sway you to give a higher / lower dose? Is more toxicity with higher dose seen?

Answer from: Radiation Oncologist at Academic Institution

To the best of my knowledge there is no good information on this topic. I rarely use post RT nowadays. However, when I do, I have not gone higher than 54 Gy when it is truly an adjuvant treatment, and I often stopped at 50.4 Gy. The main limiting factor is toxicity, both small bowel and residual rec...

Comments

Radiation Oncologist at Blanchard Valley Hospital
Under what circumstances do you treat post operati...

Radiation Oncologist at Vanderbilt-Ingram Cancer Center
N+ or margin positive disease get's post-op ChemoR...

Answer from: Radiation Oncologist at Community Practice

We use 50.4Gy and very rarely go to 54Gy.

Answer from: Radiation Oncologist at Academic Institution

max point dose of 65Gy and <40 cc over 55Gy (guideline not limit).

Answer from: Radiation Oncologist at Academic Institution

We use 54Gy as well, but limit the small bowel dose to max point dose of 55Gy and <40 cc over 45Gy (guideline not limit). Often IMRT is necessary due to fixed small bowel in the pelvis. It is important to be very cautious with apparently fixed small bowel in the pelvis.

Comments

Radiation Oncologist at CCare
Do you have a dose limit for large bowel?

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