Citrus fruit and esophageal cancer.

Esophageal cancer risk: Data about the relation with esophageal cancer risk was provided by 4 cohorts, including 598 cases (5, 7, 8, 9). A significant protective effect was found in one cohort against ESCC, but not EAC risk (7), and a nonsignificant protective effect was found in another cohort (9).

Esophageal cancer mortality: Data about the relation with esophageal cancer mortality was provided by one cohort (6). No association was found.

Conclusion: Protective associations were found in 2 cohorts, but these were nonsignificant or restricted to only 1 histologic type of cancer. Inconclusive evidence was found for an association between citrus fruit and esophageal cancer.