In 2004, the first report appeared about the watch-and-wait (WW) approach for patients with rectal cancer and a clinical complete response after neoadjuvant chemoradiotherapy.
1 Patients treated by this nonoperative approach were observed by strict surveillance, potentially avoiding total mesorectal excision (TME) and associated surgical risks. Excellent survival was seen for patients with a clinical complete response observed by the WW approach as local regrowth, occurring in 15% to 35% of patients, is generally amenable for curative treatment with TME.
2,3 Since this first report, there has been increasing interest in WW and organ-preserving strategies, reflected by an increasing number of reports by centers and research groups.
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