When treating prostate or other pelvic malignancies, what dose constraints do you use for the sigmoid colon?
Do you use the same constraints that you would for the rectum? Or perhaps employ a lower dose limit, such as not exceeding 65Gy to a small volume of the sigmoid?
Answer from: Radiation Oncologist at Community Practice
The data on cervical cancer RT with EBRT and brachy uses same constraints number for rectum and sigmoid (<65 -70 Gy to 2cc) . The corelation of sigmoid dose to toxicity is less as it is more forgiving because of organ moton. Dosimetric number which one reports is worse case scenerio n...
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