There are two main types of esophageal cancer. Both types are diagnosed, treated, and managed in similar ways.

The two most common types are named for how the cancer cells look under a microscope. Both types begin in cells in the inner lining of the esophagus:

• Adenocarcinoma of the esophagus: This type is usually found in the lower part of the esophagus, near the stomach. In the United States, adenocarcinoma is the most common type of esophageal cancer. It's been increasing since the 1970s.
  
  
• Squamous cell carcinoma of the esophagus: This type is usually found in the upper part of the esophagus. This type is becoming less common among Americans. Around the world, however, squamous cell carcinoma is the most common type.

Glossary Terms

Cancer that begins in cells that line certain internal organs and that have gland-like (secretory) properties.

Cancer that begins in squamous cells, which are thin, flat cells that look like fish scales. Squamous cells are found in the tissue that forms the surface of the skin, the lining of the hollow organs of the body, and the passages of the respiratory and digestive tracts. Also called epidermoid carcinoma.