Should the Benefit of Adjuvant Chemotherapy in Colon Cancer Be Re-Evaluated?

Påhlman, L. A. et al. Journal of Clinical Oncology. Published online: February 22, 2016

Because favorable effects on survival were seen in randomized trials conducted during the 1980s, adjuvant chemotherapy in colon cancer was established as routine therapy in stage III disease in the United States in 1990.1 Follow-up trials in the United States, Asia, and Europe2,3 soon meant that it became recommended therapy worldwide, not only in stage III but in stage II disease as well, if risk factors for recurrence were present. Additional trials established the combination of a fluoropyrimidine and oxaliplatin as reference treatment for patients with stage II disease with risk factors who are fit for therapy and for those with stage III disease.46 The addition of oxaliplatin in the treatment of elderly patients has been questioned.7 Here we present arguments questioning not only the addition of oxaliplatin in the treatment of some younger patients as well but also the offering of adjuvant chemotherapy at all to some of these patients.

Medical care continuously develops, and as a consequence, treatment results improve. This development has also been seen in colon (and rectal) cancer, and the improvements actually challenge the established benefit of adjuvant chemotherapy in colon (and rectal) cancer. We question whether the risk of recurrence is sufficiently high for most patients with stage II disease, even when risk factors are present, and for some patients with stage III disease in the presence of high-quality, modern, multidisciplinary team care to motivate adjuvant chemotherapy.

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