It is a term for the group of cancers that affect the digestive system. This includes cancers of the oesophagus, gallbladder, liver, pancreas, stomach, small intestine, bowel (large intestine or colon and rectum), and anus. GI cancers do not discriminate between men and women. In India it is the third largest type of cancer found in men and fourth largest in women.
Thoracic malignancies includes cancer of esophagus, lung and mediastinum (all cancers within the rib cage).
These tumours might not cause any symptoms unless they are in a certain location or grow to a certain size. Small tumours might not cause any symptoms and may be found accidentally when the doctor is looking for some other problem. The symptoms relate to the organ affected and can include obstruction (leading to difficulty in swallowing or defecating), abnormal bleeding or other associated problems.