This cancer starts in the cells that line the esophagus (the tube that carries food from the throat to the stomach) and usually occurs in the lower part of the esophagus, according to the Mayo Clinic.

据梅约诊所介绍，这种癌症入侵部位为食道(是由咽喉向胃输送食物的管道)中的细胞，通常发生于食道较低的部位。

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Doctors can sometimes see the cancer coming years earlier when acid reflux causes cells in the esophagus to mutate to become more like stomach tissue, a condition called Barrett's esophagus.

WSJ: Esophageal Therapy You Can Stomach