The incidence and risk of developing a second primary esophageal cancer in patients with oral and pharyngeal carcinoma: a population-based study in Taiwan over a 25 year period.

BMC Cancer · 2009 · PMC2770571 · PMID 19843324

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a strong trendno p-value reported

The occurrence of second esophageal cancer exhibited a strong trend with the onset age of oral and pharyngeal carcinoma.

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