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- W2077875999 abstract "From 1972 to 1981, 174 patients with cancer of the rectum surgically staged as B2 or C disease, underwent surgical resection of the tumors for cure. Eighty-eight patients received surgery only with no further adjuvant therapy, and the remaining 86 patients were treated with a combination of radiation and surgery. Twenty-nine patients received low-dose preoperative radiation (500 rad in one fraction); 26 patients received postoperative radiation (4500 rad in 5 weeks); and 31 patients received combined low-dose preoperative radiation (500 rad) and postoperative radiation (4500 rad in 5 weeks). This experience was analyzed to determine the patterns of failure and the impact of adjuvant therapy on survival. Patients undergoing surgery alone had a 26% incidence of local failure in the pelvis and a 57% incidence of distant metastasis. Patients receiving low-dose preoperative radiation had a reduction in the rate of distant metastasis (24%), but no effect on local failure (34%). On the other hand, patients receiving postoperative radiation had a reduction in the local failure rate (11%), with no effect on distant metastasis (50%). Patients who received the combined preoperative and postoperative treatment had a reduction in both the local recurrence rate (7%), and the rate of distant metastasis (13%), and these patients also had a substantial improvement in survival over surgery alone. Survival of patients undergoing surgery alone was 34% at 5 years and was not substantially different for patients undergoing low-dose preoperative irradiation (48%), or for patients receiving postoperative irradiation (29%). Survival in patients receiving combined preoperative and postoperative irradiation was substantially better (78%) than the other groups of patients." @default.
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- W2077875999 date "1985-01-15" @default.
- W2077875999 modified "2023-09-27" @default.
- W2077875999 title "Results of adjuvant radiation therapy in cancer of the rectum. Thomas Jefferson university hospital experience" @default.
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- W2077875999 doi "https://doi.org/10.1002/1097-0142(19850115)55:2<350::aid-cncr2820550208>3.0.co;2-3" @default.
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