Which structure is primarily affected by gastritis?

Gastritis specifically refers to the inflammation of the gastric mucosa, which is the protective lining of the stomach. This inflammation can result from various factors, including infection (such as Helicobacter pylori), long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs), excessive alcohol consumption, or autoimmune responses. When the gastric mucosa is compromised, it can lead to symptoms such as abdominal pain, nausea, and vomiting, and, in severe cases, bleeding or ulcers can develop.

Other structures such as the small intestine, liver, and pancreas are not primarily impacted by gastritis, although conditions affecting the stomach can have secondary effects on these organs. For example, while gastritis can lead to digestive issues that may affect how the small intestine processes food, the initial and direct impact is on the gastric mucosa itself.