Prospective phase II study of preoperative short-course radiotherapy for rectal cancer with twice daily fractions of 2.9 Gy to a total dose of 29 Gy--long-term results.

Radiat Oncol · 2009 · PMC2806295 · PMID 20025752

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did not reach statistical significanceno p-value reported

Five-year OS was 70% and 50% when adjuvant chemotherapy was given or withheld, respectively, but this difference did not reach statistical significance.

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