Hiatal hernia is a condition in which part of the stomach extends through an opening of the diaphragm into the chest. The diaphragm is the sheet of muscle that divides the chest from the abdomen.
Hernia - hiatal
The exact cause of hiatal hernias is unknown. The condition may be due to weakness of the supporting tissue. Your risk for the problem goes up with age, obesity, and smoking. Hiatal hernias are very common. The problem occurs often in people over 50 years.
This condition may cause reflux (backflow) of gastric acid from the stomach into the esophagus.
Petersen RP, Pellegrini CA, Oelsclanger BK. Hiatal hernia and gastroesophageal reflux disease. In: Townsend CM Jr, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery. 19th ed. Philadelphia, PA: Elsevier Saunders; 2012:chap 44.
Subodh K. Lal, MD, Gastroenterologist with Gastrointestinal Specialists of Georgia, Austell, GA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.