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[Is radiotherapy necessary in the control of colorectal cancer?]
J Molina Esquivel1, G Vargas Sandoval, E Rodríguez del Rincón
1Departamento de Radioterapia (Sevicio de Oncología), Hospital 20 de Noviembre del Instituto de Seguridad Social al Servicio de los Trabajadores del Estado, México, D.F.
Abstract:
Between 1966 and 1983 we selected 209 patients with colorectal adenocarcinomas, stage B (14%) and C (86%) of Dukes, treated with convenient surgery in 100% of cases, 5-fluorouracil in 85% and postoperative radiotherapy with telecobalt in 46.41% of cases, doses of 5000 to 5500 cGy in 25 to 30 fractions. The results at five years postsurgery were: colon patients who received radiotherapy obtained a survival rate of 34 months versus 17 months for those who did not receive radiotherapy; rectum patients who received radiotherapy survival rate of 20 months versus 26 months for those who did not received. Local recurrences in patients who received radiotherapy were 9.30% for carcinomas of the colon and 11.53% for those with cancer of the rectum, and in patients who did not received radiotherapy local recurrences were 22.22% for those with cancer of the colon and 37.83% for those with cancer of the rectum.