Small opening in the diaphragm that allows the upper part of the stomach to move up into the chest.

• A. Inguinal hernia
• B. Umbilical hernia
• C. Congenital diaphragmatic hernia
• D. Hiatal hernia

Answer: (D)

A hiatal hernia occurs when part of the stomach herniates through the esophageal hiatus, the opening in the diaphragm where the esophagus passes to join the stomach. When the upper part of the stomach moves up into the chest through that natural opening, that’s a hiatal hernia. This differs from other hernias: an inguinal hernia goes through the groin area, an umbilical hernia goes through the naval region, and a congenital diaphragmatic hernia is a broader, usually birth-related defect in the diaphragm that allows abdominal contents to enter the chest, not specifically through the esophageal opening.