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Adjuvant chemotherapy with folinic acid and 5-fluorouracil in patients with locally advanced rectal cancer previously treated by preoperative radiochemotherapy and curative tumor resection

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International Journal of Colorectal Disease Aims and scope Submit manuscript

Abstract

Background and aims

The role of postoperative adjuvant chemotherapy in patients with rectal cancer pretreated by preoperative radiochemotherapy (RCT) and curative surgery is still poorly investigated.

Patients and methods

We pooled data from both arms of a phase III trial in which patients with locally advanced (T3/4) rectal cancer were randomized to preoperative RCT alone or combined with pelvic radio-frequency hyperthermia. After surgery, R0-resected patients were scheduled to adjuvant chemotherapy with four monthly courses of 50 mg folinic acid (FA) and gradually escalated 5-fluorouracil (5-FU, 350–500 mg/m2, days 1–5). Reasons preventing initiation of chemotherapy and treatment-related toxicities were evaluated. Patients’ characteristics and survival parameters were compared between the treated and untreated patient groups.

Results

Out of 93 patients, 73 (79%) started adjuvant chemotherapy, whereas 19 (21%) did not, mostly due to perioperative complications and refusal. Chemotherapy-related toxicities were mild to moderate in most cases, but—together with protracted postoperative complications—prevented the intended dose escalation of 5-FU in 71% of patients. Distant-failure-free (p=0.03) and overall survival (p=0.03) were improved in the chemotherapy group, although there was a negative selection of patients with unfavourable characteristics into the untreated patient group.

Interpretation/conclusion

Adjuvant chemotherapy using FA and 5-FU can be safely applied to the majority of patients with rectal cancer pretreated by RCT and surgery. Survival data are not suitable to allow far-reaching conclusions, but are in line with suggestions of a favourable effect of adjuvant chemotherapy in these patients.

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Acknowledgements

This work was supported by grants of the German Research Ministry (DFG-SFB 273, GraKo 331).

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Correspondence to Bert Hildebrandt.

Additional information

We dedicate this manuscript to Dr. Jürgen Löffel, who unexpectedly died on December 16, 2003, at the age of 40. Dr. Löffel was an outstanding physician and oncologist. He significantly contributed to the planning, initiation and success of this study

B. Hildebrandt and B. Rau contributed equally to this manuscript

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Hildebrandt, B., Rau, B., Löffel, J. et al. Adjuvant chemotherapy with folinic acid and 5-fluorouracil in patients with locally advanced rectal cancer previously treated by preoperative radiochemotherapy and curative tumor resection. Int J Colorectal Dis 21, 582–589 (2006). https://doi.org/10.1007/s00384-005-0054-9

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