Gastrointestinal cancer refers to malignant conditions of the alimentary canal and accessory organs of digestion, including the esophagus, stomach, biliary system, pancreas, intestine , intestine , rectum and anus. The symptoms relate to the organ affected and may include obstruction, abnormal bleeding or other associated problems. The diagnosis often requires endoscopy, followed by biopsy of suspicious tissue. The treatment depends on the situation of the tumor, also because the sort of neoplastic cell and whether it's invaded other tissues or spread elsewhere. These factors also determine the prognosis. General Information About Gastric Cancer: Gastric cancer may be a disease during which malignant (cancer) cells form within the lining of the stomach. Age, diet, and stomach disease can affect the danger of developing gastric cancer. Symptoms of gastric cancer include indigestion and stomach discomfort or pain. Tests that examine the stomach and esophagus are wont to diagnose gastric cancer. Certain factors affect prognosis (chance of recovery) and treatment options. Gastric cancer begins within the mucosa and spreads through the outer layers because it grows. Depending on the stage of esophageal cancer the patient may undergo surgery, radiation and/or chemotherapy. Other measures which will improve symptoms include stretching or dilation, tube prosthesis (stent) and radiation or laser treatment to scale back the dimensions of the cancer. Doctors are actively watching new ways of mixing various sorts of treatment to ascertain if they'll have a far better effect on treating esophageal cancer. Many patients with esophageal cancer undergo some sort of combination therapy with surgery, radiation and chemotherapy. Some patients with very early cancer of the esophagus may undergo an endoscopic resection of the cancer without surgery using techniques such as endoscopic mucosal resection or endoscopic submucosal dissection.