Digestive cancer is a disease in which malignant (cancer) cells form in the tissues of the digestive tract.

The digestive tract is made up of the stomach, throat, esophogus, small intestine, large intestine.

The stomach is a J-shaped organ in the upper abdomen. It is part of the digestive system, which processes nutrients (vitamins, minerals, carbohydrates, fats, proteins, and water) in foods that are eaten and helps pass waste material out of the body. Food moves from the throat to the stomach through a hollow, muscular tube called the esophagus. After leaving the stomach, partly-digested food passes into the small intestine and then into the large intestine. 

Digestive Cancer is identified by nine different categories:

Anal Cancer 

Bile Duct Cancer, Extrahepatic

Colon

Esophageal Cancer

Gallbladder Cancer

Gastrointestinal Carcinoid Tumor

Rectal 

Small Intestine Cancer

Stomach Cancer

Source: National Cancer Institute