Animal experiments showed that tea can inhibit the rat esophagus cancer incidence.

Objective: to investigate the serum level of vascular endothelial growth factor (VEGF) and its clinical value in patients with esophageal cancer and stomach cancer.

There are "trends" -- subtle increases -- in gastro-esophageal cancers and blood cancers such as multiple myeloma, and non-Hodgkin's lymphoma, said Prezant, but they are difficult to generalize.