https://www.thelancet.com/pdfs/journals/lancet/PIIS0140-6736(00)02139-5.pdf

Surgery and postoperative radiotherapy versus surgery alone for patients with stage-1 endometrial carcinoma: multicentre randomised trial

https://dspace.library.uu.nl/bitstream/handle/1874/19328/c5a.pdf

Low-risk corpus cancer: is lymphadenectomy or radiotherapy necessary?

https://obgyn.onlinelibrary.wiley.com/doi/pdf/10.1016/j.ijgo.2015.06.005

Cancer of the corpus uteri

Purpose Stage IC, grade 3 endometrial cancer is regarded as a high-risk category. Stage IC, grade 3 patients were not eligible for the randomized Postoperative Radiation Therapy in Endometrial Carcinoma (PORTEC) trial, but were registered and received postoperative radiotherapy. Patients and Methods The PORTEC trial included 715 patients with stage IC, grade 1 or 2, and stage IB, grade 2 or 3 endometrial cancer. Patients were randomly assigned after surgery to receive pelvic radiotherapy (RT) or no further treatment. A total of 104 patients with stage IC, grade 3 endometrial cancer were registered, of whom 99 could be evaluated. Patterns of relapse and survival were compared with PORTEC patients receiving RT. Median follow-up was 83 months. Results The actuarial 5-year rates of locoregional relapse were 1% to 3% for PORTEC patients who received RT, compared with 14% for stage IC, grade 3 patients. Five-year distant metastases rates were 3% to 8% for grade 1 and 2 tumors; 20% for stage IB, grade 3 tumors; ...

https://ascopubs.org/doi/pdf/10.1200/JCO.2004.08.159

Outcome of high-risk stage IC, grade 3, compared with stage I endometrial carcinoma patients: the Postoperative Radiation Therapy in Endometrial Carcinoma Trial

Cancer of the corpus uteri: 2021 update.

In an attempt to create uniform nationwide guidelines for the management of all stages of endometrial carcinoma, and to limit the use of adjuvant radiation therapy in stage I disease to high-risk patients only, a protocol was developed by the Danish Endometrial Cancer group (DEMCA). From September 1986 through August 1988, 1214 women in Denmark with newly diagnosed carcinoma of the endometrium have been treated according to this protocol. This figure represents all endometrial carcinomas diagnosed in Denmark during this 2-year period. The primary treatment was total abdominal hysterectomy and bilateral salpingo-oophorectomy and no preoperative radiation therapy was delivered. In 1039 cases no macroscopic residual tumor and/or microscopic tumor tissue in the resection margins was found following surgery. Based on surgery and histopathology, these patients were classified as: P-stage I low-risk (grade 1 & 2 and ≤ 50% myometrial invasion), P-stage I high-risk (grade 1 & 2 and > 50% myometrial invasion, and grade 3), P-stage II and P-stage III (Group 1). Distribution was as follows: P-I low-risk 641 patients, P-I high-risk 235, P-II 105 and P-III (Group 1) 58 patients. No postoperative radiation therapy was given to P-I low-risk cases. P-I high-risk, P-II, and P-III (Group 1) cases received external radiation therapy. Recurrence rate at 68-92 months follow-up was 45/641 (7%) in P-I low-risk, 36/235 (15%) in P-I high-risk, 30/105 (29%) in P-II, and 27/58(47%) in P-III (Group 1) cases. Fifteen of 17 vaginal recurrences in P-I low-risk cases were salvaged (mean observation time 61 months).

Adjuvant radiation therapy is not necessary in the management of endometrial carcinoma stage I, low‐risk cases

In an attempt to create uniform nationwide guidelines for the management of all stages of endometrial carcinoma, and to limit the use of adjuvant radiation therapy in stage I disease to high-risk patients only, a protocol was developed by the Danish Endometrial Cancer group (DEMCA). From September 1986 through August 1988, 1214 women in Denmark with newly diagnosed carcinoma of the endometrium have been treated according to this protocol. This figure represents all endometrial carcinomas diagnosed in Denmark during this two-year period. The primary treatment was total abdominal hysterectomy and bilateral salpingo-oophorectomy, no preoperative radiation therapy was delivered. In 1039 cases no macroscopic residual tumour and/or microscopic tumor tissue in the resection margins was found following surgery. Based on surgery and histopathology, these patients were classified as: P-stage I low risk (n = 641), P-stage I high risk (n = 235), P-stage II (n = 105) and P-stage III, Group 1 (n = 58). No postoperative radiation therapy was given to P-I low risk cases. P-I high risk, P-II, and P-III (Group 1) cases received external radiation therapy. Recurrence rate at 68-92 months follow-up was 45/641 (7%) in P-I low risk, 36/235 (15%) in P-I high risk, 30/105 (29%) in P-II, and 27/58 (47%) in P-III (Group 1) cases. Fifteen of 17 vaginal recurrences in P-I low risk cases were salvaged (mean observation time 61 months). In this population-based investigation it has been shown that P-stage low-risk patients are adequately treated by total abdominal hysterectomy and bilateral salpingo-oophorectomy, and that no pre- or postoperative radiation therapy is necessary.

Patients with early stages of endometrial cancer should be spared adjuvant radiotherapy. Danish Endometrial Cancer Group

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Adjuvant radiation therapy is not necessary in the management of endometrial carcinoma stage I, low‐risk cases

Patients with early stages of endometrial cancer should be spared adjuvant radiotherapy. Danish Endometrial Cancer Group