Chronic gastritis primarily affects which part of the stomach in 90% of cases?

Chronic gastritis typically has a predominant effect on the antrum of the stomach in approximately 90% of cases. The antrum is the lower part of the stomach that plays a crucial role in the digestive process, particularly in grinding up food and regulating the emptying of the stomach content into the duodenum.

Chronic gastritis can result from factors such as long-term infection with Helicobacter pylori, excessive use of non-steroidal anti-inflammatory drugs (NSAIDs), or alcohol consumption, which tend to disrupt the mucosal barrier primarily in the antrum.

While the body and fundus of the stomach can also be affected, they are less commonly involved in chronic gastritis compared to the antrum. Therefore, understanding the anatomical regions of the stomach helps clarify why the antrum is significantly affected in chronic gastritis cases.