Rider W D
Can J Surg. 1978 May;21(3):215, 218.
Radiotherapy has an increasingly important place in the management of patients with colorectal cancer. At present the exact indications have not been made based on preliminary experience at the Princess Margaret Hospital, Toronto: 1. Radical irradiation could be a valuable alternative to the classical Miles' abdominoperineal excision of extraperitoneal rectal cancer. 2. Preoperative irradiation may be used for all patients undergoing surgical excision and restoration of bowel continuity. 3. Postoperative radiotherapy can be administrated (a) when the tumour has penetrated the bowel wall to the serosa or beyond, (b) when the lymph nodes are involved secondarily and (c) when the distal line of resection is less than 4.0 cm from the tumour (as measured in the fixed pathological specimen). 4. Radiotherapy is useful for palliation of postsurgical recurrences and symptomatic distant metastases.
放射疗法在结直肠癌患者的治疗中所占地位日益重要。根据多伦多玛格丽特公主医院的初步经验，目前尚未明确确切的适应症：1. 根治性放疗可能是经典的经腹会阴直肠癌根治术（Miles手术）治疗腹膜外直肠癌的一种有价值的替代方法。2. 术前放疗可用于所有接受手术切除并恢复肠道连续性的患者。3. 术后放疗可在以下情况进行：(a) 肿瘤已穿透肠壁至浆膜层或更远处；(b) 淋巴结继发受累；(c) 切除线远端距肿瘤小于4.0厘米（在固定的病理标本中测量）。4. 放疗有助于缓解术后复发和有症状的远处转移。
