Stomach Stomach The stomach (from ancient Greek στόμαχος, "stomachos," "stoma" means mouth) is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates. The stomach has a dilated structure and functions as a vital digestive organ. In the digestive system the stomach is involved in the second phase of digestion, following mastication (chewing). In humans and many other animals, the stomach is located between the oesophagus and the small intestine. It secretes digestive enzymes and gastric acid to aid in food digestion. The pyloric sphincter controls the passage of partially digested food (chyme) from
Tumor of the stomach Diet high in salt and nitrates. 4. Polyps 5. Genetic alterations - p53 mutation, microsatellite instability, E-cadherin gene 6. Previous radiation 7. Pernicious anaemia Signs and Symptoms Dysphagia, indigestion, feeling full after eating very little, loss of appetite, nausea, abdominal pain, loss of weight, vomitting blood and passing black stool. Investigations Upper Gastointestinal Endoscopy. Tumor of the stomach A gastric tumor is a tumor of the stomach. It can be benign or malignant (gastric cancer). The gastric mucosa is composed of columnar epithelium arranged with pits known as crypts. There are several types of cells that make up gastric mucosa