International journal of clinical oncology
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Int. J. Clin. Oncol. · Dec 2016
Incidence and risk factors of synchronous colorectal cancer in patients with esophageal cancer: an analysis of 480 consecutive colonoscopies before surgery.
The precise incidence rates of multiple primary colorectal cancers in esophageal cancer patients are unknown. ⋯ The results of the present study suggested that pretreatment screening with total colonoscopy is meaningful for patients with esophageal cancer, because the frequency of synchronous colorectal cancer was not negligible. Particularly, in patients >70 years and with history of heavy smoking, pretreatment colonoscopy might be necessary.