What Is Helicobacter Pylori (H. Pylori) Infection? [dropcap]H[/dropcap]elicobacter pylori infection is a potentially deadly stomach disease characterized by chronic superficial inflammation and ulcerations in 100% of infected patients. This infection disrupts normal defense and repair…
[dropcap]G[/dropcap]astric ulcer is a painful stomach disorder characterized by an open sore involving the mucosa lining and deeper muscle layer of the stomach.
Gastric ulcer is associated with lymphocytic gastritis which is inflammation of the mucosal lining of the stomach. The thick mucosal lining normally protects the stomach from the erosive action of stomach acid.
Q: How do ulcers develop?
A: Ulcers develop if hydrochloric acid secreted by the gastric glands of the stomach for the purpose of digesting food damages the normally resistant mucosal walls of the stomach. In the reverse, ulcers may be accompanied by achlorhydria (insufficient acid production).
Damage occurs when there is a predisposing factor that alters the health of the mucosal lining. The most common cause is infection with a bacteria called h. pylori bacter, stress and chronic use of the pain relievers aspirin and non-steroidal drugs like ibuprofen.
Smoking tocacco and consuming alcohol aggravate an ulcer but do not cause it to develop.
The most common location for ulcer formation is along the stomach antrum which is the area of the stomach before the pylorus, the lower region that empties liquid stomach contents into the small intestine.
What Is Lymphocytic Gastritis?[dropcap]L[/dropcap]ymphocytic gastritis is an inflammatory stomach disorder that is characterized by superficial inflammation of the stomach lining (mucosa) that mainly involves the gastric antrum in children.
Lymphocytic gastritis is defined by the recognition of more than 25 intraepithelial lymphocytes (IEL) per 100 surface epithelial cells lining the stomach wall.
Q: What are intraepithelial lymphocytes?
A: Intraepithelial lymphocytes in lymphocytic gastritis are a unique T-cell population of white blood cells that are interspersed between epithelial cells in the mucosa.
What Is Vomiting?[dropcap]V[/dropcap]omiting is the regurgitation of swallowed food back out of the mouth.
[dropcap]D[/dropcap]elayed gastric emptying is a stomach motility or movement disorder characterized by abnormally slow movement of gastric contents from the stomach through the pyloric sphincter into the duodenum, causing dyspepsia.
Q: What determines how fast the stomach empties?
A: How fast the stomach empties depends on the pressure of strong coordinated muscle contractions in the top region of the stomach propelling chyme against resistance at the pylorus (base region of the stomach).
Chyme is food that has been dissolved and thoroughly mixed with stomach secretions.
In the digestion of carbohydrate, protein and fat, protein leaves the stomach first (1 hour), then carbohydrates (1 1/2 to 2 hours), and fat takes longest to digest (2-4 hours). Plain water is able to pass through the pylorus within 5 minutes.
[dropcap]M[/dropcap]ultiple gastric ulcerations denote a stomach disorder that involves damage to the superficial mucosa characterized by many sores of the stomach antrum that are marked by inflammation, necrosis (death of the affected cells) and sloughing of destroyed tissue.
Q: Where is the stomach antrum?
A: The antrum is the lower region of the stomach before the pylorus which is nearest the duodenum (first part of the small intestine). The stomach and duodenum are separated by the powerful pyloric sphincter.
The stomach antrum propels food in the stomach against the pylorus which resists passage of food until it is turned into chyme. Chyme is highly acidic liquified food that has been thoroughly mixed with stomach juices.
Gastric ulcerations are typically associated with widespread gastritis (inflammation), inflammatory involvement of acid producing cells, and atrophy of acid and pepsin producing cells.1
The primary causes of gastric ulcerations are H. pylori infection, use of Aspirin and non-steroidal drugs (NSAIDS), and stress.1
[dropcap]C[/dropcap]ollagenous gastritis is a rarely reported stomach disorder characterized by the deposition of a subepithelial collagen band and accompanying inflammatory infiltrate in the stomach wall.
A subepithelial collagen band means that collagen, a tough fibrous protein, has abnormally accumulated under the surface layer of epithelial cells which form the mucosa lining the stomach.
The surface mucosa may remain intact and not show lymphocytosis and/or gastritis on endoscopic examination or it may become stripped off and bleed from entrapped capillaries. Biopsy is necessary to diagnose collagenous gastritis.1
Q: Why does collagen become deposited under the surface lining of the stomach?
A: It is thought that collagen deposition is preceded by inflammation and tissue damage. However, the natural history and pathogenesis of collagenous gastritis remain unclear.2