The ulcer is known initially as a peptic ulcer before the ulcer burns through the full thickness of the stomach or duodenal wall. A diagnosis is made by taking an erect abdominal/chest X-ray (seeking air under the diaphragm). This is in fact one of the very few occasions in modern times where surgery is undertaken to treat an ulcer. Many<unk> s have been attributed to the bacterium Helicobacter pylori.
Perforated ulcer
Tropical ulcer
Callous ulcer
Evisceration 
Kangri ulcer
Cushing ulcer
Gastric erosion
Curling's ulcer