Known as Peptic Ulcer Disease, peptic ulcers are regarded as the most common ulcers that afflict the gastro intestinal area. A common misconception about ulcers is that they are solely based along the linings of the stomach. Nothing could be further from the truth. Experts estimate that the occurrence rate of peptic ulcers in the duodenum is four times as high as the occurrence rate in the stomach. A minuscule amount of these ulcers are caused by malignant tumors; the consequence of this is that a number of biopsies need to be carried out to ascertain that the tumor in question is not cancerous in nature. At the other end of the scale, a good number of peptic ulcers are associated with a bacterium that lives in the acidic environment of the stomach. Ulcers are region specific and it is on account of this that there is a classification of these ulcers based on the region of occurrence. The classification looks something like this: Duodenal ulcer – an ulcer that occurs in the duodenum; stomach ulcer known as gastric ulcer; esophagus ulcer - an ulcer that affects the esophagus; and an ulcer referred to as Meckels diverticulum. These are the classifications of the ulcers.