Abstract
In the last ten years, considerable progress has been achieved in the treatment of rectal cancer. According to improved interdisciplinary staging, rectal carcinomas can be treated based on a stage-dependent concept: "low-risk" pT1 (G1/G2) carcinomas can be cured by local full wall excision, while "high-risk" pT1 (G3/G4) and pT2 carcinomas require transabdominal resection. In contrast, locally advanced rectal cancers in cUICC-II/-III stages (T3/T4 or N(+)) should receive long-term, 5-FU-based, neoadjuvant chemoradiotherapy according to the excellent results of the CAO/AIO/ARO-94 trial of the German Rectal Cancer Study Group. High-quality resection must be based on radical oncologic principles such as "no-touch" technique, radicular dissection of vessels, and total mesorectal excision. Multimodal treatment is completed with adjuvant 5-FU-based chemotherapy. This therapeutic approach led to a reduction in the 5-year local recurrence rate to 6% and disease-free survival of approximately 68% in advanced rectal cancer (overall survival: 76%).
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