RT Journal A1 Torpy JM, Lynm C, Golub RM T1 PEptic ulcer disease JF JAMA JO JAMA YR 2012 FD March 28 VO 307 IS 12 SP 1329 OP 1329 DO 10.1001/jama.2012.184 UL http://dx.doi.org/10.1001/jama.2012.184 AB Peptic ulcers are small sores that form in the lining of the esophagus (swallowing pipe), stomach, or duodenum (the first part of the small intestine). About 15 million people in the United States have peptic ulcer disease. If you have peptic ulcer disease or another problem with digestion, you may be referred to a specialist called a gastroenterologist. Gastroenterologists are doctors with specialized education in the management of digestive disorders and the gastrointestinal tract.