PMC

Kaplan-Meier curves for (a) overall survival, (b) local control, and (c) distant metastasis for all patients with RPS treated with IMRT

Kaplan-Meier curves for local control for patients with RPS stratified by (a) pre-operative (pre-op, red) versus post-operative (post-op, blue) RT, (b) surgical margin status, and (c) histology. Surgical margin status was significantly associated with local control (p = 0.018)

Contours and IMRT treatment plan with a simultaneous integrated boost for a patient with RPS treated with post-operative radiation therapy. a Contours on a representative simulation computed tomography scan. Red contour represents the high risk posterior margin that will receive a high dose (CTV1), while the green contour represents CTV2, which provides a lower, bowel tolerant dose to a larger area at risk. b IMRT treatment plan with isodose lines. Contours the same as above (red contour = CTV1, green contour = CTV2). The volume receiving 6300 cGy is green, while the lower dose volumes, 5250 cGy and 4200 cGy are yellow and blue respectively