Which structure is herniated when a gastrocele exists?

A gastrocele, also known as a gastrocele hernia, occurs when a portion of the stomach protrudes through an opening in the diaphragm or abdominal wall. This typically involves the herniation of the stomach itself, which can occur due to weakened muscles or connective tissue in the area. Gastroceles are often associated with conditions like hiatal hernias, where the stomach moves into the chest cavity through the diaphragm.