Abstract
Adjuvant chemoradiotherapy trials demonstrated a reduction in local failure and an increase in survival of patients with locally advanced rectal cancer submitted to upfront surgery. The standard-of-care shifted to neoadjuvant chemoradiotherapy when the German Rectal Cancer Study Group Trial demonstrated the benefit of neoadjuvant compared to adjuvant fluoropyrimidine chemoradiotherapy in lower rates of local failure, lower toxicity in patients optimally resected with total mesorectal excision (TME), and higher rate of sphincter-sparing surgery. Overall survival (OS) was equivalent in both arms. The benefit of adjuvant chemotherapy after preoperative chemoradiotherapy has not been clearly demonstrated in randomized trials. This review will discuss the role of fluoropyrimidine-based and oxaliplatin-based adjuvant chemotherapy in patients treated with neoadjuvant chemoradiotherapy.
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