Definition
Gastritis commonly refers to inflammation of the lining of the stomach, but the term is often used to cover a variety of symptoms resulting from this inflammation, as well as symptoms of burning or discomfort. True gastritis comes in several forms and is diagnosed using a combination of tests. In the 1990s, scientists discovered that the main cause of most gastritis is infection by a bacterium called Helicobacter pylori.
Description
Gastritis should not be confused with common symptoms of upper abdominal discomfort. It has been associated with ulcers, particularly peptic ulcers, and in some cases, chronic gastritis can lead to more serious complications.
Nonerosive H. pylori gastritis
Under current theory, the main cause of true gastritis is H. pylori infection, which is found in an average of 90% of patients with chronic gastritis. H. pylori is a bacterium whose outer layer is resistant to the normal effects of stomach acid in breaking down bacteria. The resistance of H. pylori means that the bacterium may remain in the stomach for long periods of times, even years, and eventually cause symptoms of gastritis or ulcers when other factors are introduced, such as the presence of specific genes or the use of nonsteroidal anti-inflammatory drugs (NSAIDs). Studies of the role of H. pylori in the development of gastritis and peptic ulcers have disproved the former belief that stress leads to most stomach and duodenal ulcers. The newer findings have resulted in improved treatment and reduction of stomach ulcers. H. pylori is most likely transmitted between humans, although the specific routes of transmission are still under study. Studies were also underway to determine the role of H. pylori and resulting chronic gastritis in the development of gastric cancers.
Erosive and hemorrhagic gastritis
After H. pylori, the second most common cause of chronic gastritis is the use of NSAIDs. These commonly used pain killers, including aspirin, fenoprofen, ibuprofen and naproxen, can lead to gastritis and peptic ulcers. Other forms of erosive gastritis are caused by alcohol or corrosive agents, or by injuries to the stomach tissues from the ingestion of foreign bodies.
Other forms of gastritis
Clinicians differ on the classification of the less common and specific forms of gastritis, particularly since there is so much overlap with H. pylori in development of chronic gastritis and complications of gastritis. Other types of gastritis that may be diagnosed include:
Acute stress gastritis. This is the most serious form of gastritis. It usually occurs in critically ill patients, such as those in intensive care. Stress erosions may develop suddenly as a result of severe trauma or stresses on the stomach lining.
Atrophic gastritis. This form of gastritis results from chronic gastritis. It is characterized by atrophy, or a decrease in size and wasting away of the gastric lining. Gastric atrophy is the final stage of chronic gastritis and may be a precursor of gastric cancer.
Superficial gastritis. This term is often used to describe the initial stages of chronic gastritis.
Uncommon specific forms of gastritis include granulomatous, eosiniphilic, and lymphocytic gastritis.
Causes & symptoms
Nonerosive H. pylori gastritis
H. pylori gastritis is caused by infection from the H. pylori bacterium. It is believed that most infection occurs in childhood. Clinicians think that there may be more than one route for the bacterium. Its prevalence and distribution differs in nations around the world. The presence of H. pylori has been detected in 86–99% of patients with chronic superficial gastritis. Physicians are still learning about the link of H. pylori to chronic gastritis and peptic ulcers, since many patients with H. pylori infection do not develop symptoms or peptic ulcers. H. pylori is also seen in 90–100% of patients with duodenal ulcers.
The symptoms of H. pylori gastritis include abdominal pain and reduced acid secretion in the stomach. The majority of patients with H. pylori infection, however, suffer no symptoms, even though the infection may lead to ulcers and resulting symptoms. Ulcer symptoms include dull, gnawing pain, often two to three hours after meals; and pain in the middle of the night when the stomach is empty.
Erosive and hemorrhagic gastritis
The most common cause of this form of gastritis is the use of NSAIDs. Other causes may be alcoholism or stress from surgery or critical illness. The role of NSAIDs in development of gastritis and peptic ulcers depends on the dose level. Although even low doses of aspirin or other nonsteroidal anti-inflammatory drugs may cause some gastric upset, low doses generally will not lead to gastritis. However, as many as 10–30% of patients on higher and more frequent doses of NSAIDs, such as those with chronic arthritis, may develop gastric ulcers. Patients with H. pylori already present in the stomach who are treated with NSAIDs are much more susceptible to ulcers and other gastrointestinal effects of these pain killers.
Patients with erosive gastritis may also show no symptoms. When symptoms do occur, they may include anorexia nervosa, gastric pain, nausea, and vomiting.
Reflexology
A trained reflexologist will gently massage the stomach reflexes located on the hands and feet. On the hands, the stomach reflexes are on the palms, below the pads of the middle and index fingers. On the feet, the stomach reflexes are located on the sole just below the pad of the big toe.