BACKGROUND: The role of adjuvant postoperative radiotherapy for locally advanced colon cancer is not well documented. METHODS: Seventy-eight patients who underwent a complete resection of B2-C colon cancer received postoperative radiotherapy. Twenty-eight patients received < or = 45 Gy; 50 patients received 50-55 Gy. Twenty-seven patients received adjuvant fluorouracil-based chemotherapy. All patients were followed for a minimum of 3 years; no patients were lost to follow-up. RESULTS: The overall local control rate was 88%. The 5-year actuarial rate of local control was 96% after 50-55 Gy postoperative radiotherapy compared with 76% after < 50 Gy (p = 0.0095). Multivariate analysis of local control showed that only radiotherapy dose significantly influenced this end point. Cause-specific survival rates at 5 years were B2, 67%; B3, 90%; C1, 100%; C2, 61%; C3, 36%; and overall, 63%. Multivariate analysis of cause-specific survival showed that only stage significantly influenced this end point. Bowel obstruction caused by adhesions developed in three patients and required a laparotomy; radiation-induced sarcoma developed in one additional patient. CONCLUSIONS: Postoperative radiotherapy appears to reduce the risk of local recurrence in patients with locally advanced colon cancer. The optimal dose is probably 50-55 Gy at 1.8 Gy per fraction. Postoperative radiotherapy may improve cause-specific survival for patients with stages B3 and C2 cancers.
BACKGROUND: The role of adjuvant postoperative radiotherapy for locally advanced colon cancer is not well documented. METHODS: Seventy-eight patients who underwent a complete resection of B2-C colon cancer received postoperative radiotherapy. Twenty-eight patients received < or = 45 Gy; 50 patients received 50-55 Gy. Twenty-seven patients received adjuvant fluorouracil-based chemotherapy. All patients were followed for a minimum of 3 years; no patients were lost to follow-up. RESULTS: The overall local control rate was 88%. The 5-year actuarial rate of local control was 96% after 50-55 Gy postoperative radiotherapy compared with 76% after < 50 Gy (p = 0.0095). Multivariate analysis of local control showed that only radiotherapy dose significantly influenced this end point. Cause-specific survival rates at 5 years were B2, 67%; B3, 90%; C1, 100%; C2, 61%; C3, 36%; and overall, 63%. Multivariate analysis of cause-specific survival showed that only stage significantly influenced this end point. Bowel obstruction caused by adhesions developed in three patients and required a laparotomy; radiation-induced sarcoma developed in one additional patient. CONCLUSIONS: Postoperative radiotherapy appears to reduce the risk of local recurrence in patients with locally advanced colon cancer. The optimal dose is probably 50-55 Gy at 1.8 Gy per fraction. Postoperative radiotherapy may improve cause-specific survival for patients with stages B3 and C2 cancers.
Authors: A H Russell; D Tong; L E Dawson; W M Wisbeck; T W Griffin; G E Laramore; K H Luk Journal: Int J Radiat Oncol Biol Phys Date: 1983-03 Impact factor: 7.038
Authors: C S Wong; A R Harwood; B J Cummings; T J Keane; G M Thomas; W D Rider Journal: Int J Radiat Oncol Biol Phys Date: 1985-12 Impact factor: 7.038
Authors: D Tong; A H Russell; L E Dawson; W M Wisbeck; T W Griffin; G E Laramore; K H Luk Journal: Int J Radiat Oncol Biol Phys Date: 1983-03 Impact factor: 7.038
Authors: C G Moertel; T R Fleming; J S Macdonald; D G Haller; J A Laurie; C M Tangen; J S Ungerleider; W A Emerson; D C Tormey; J H Glick; M H Veeder; J A Mailliard Journal: Ann Intern Med Date: 1995-03-01 Impact factor: 25.391
Authors: Sare Hosseini; Ali Mohammad Bananzadeh; Mohammad Mohammadianpanah; Roham Salek; Ali Taghizadeh-Kermani Journal: Radiat Oncol J Date: 2018-03-05