<unk> s are single or multiple mucosal defects which can become complicated by upper gastrointestinal bleeding during the physiologic<unk>  of serious illness.  Ordinary peptic ulcers are found commonly in the gastric antrum and the duodenum whereas<unk> s are found commonly in fundic mucosa and can be located anywhere within the stomach and proximal duodenum.
Stress ulcer
Stasis ulcer
Tropical ulcer
Aphthous ulcer
Peptic ulcer
Venous ulcer
Hunner's ulcer
Buruli ulcer