Dear Doctors: A family friend is suddenly on hospice care because of esophageal cancer, which has spread to his lungs and liver. The thing is, he never even knew he had it. Other than getting the hiccups and losing some weight, he was fine. What causes this cancer? How common is it?
Dear Reader: Cancer of the esophagus is the eighth-most-common cancer worldwide. Although it is seen less often in th…