The stomach is located in the Abdomen.
An operation on a stomach ulcer would take place in the abdominal cavity.
Left Upper Quadrant
The final result of a an untreated peptic ulcer or perforated stomach would cause the contents of the stomach would leak into the intestinal cavity and cause acid damage and poisoning to the internal organs resulting in death.
High fever and stomach pain.
Many things would be considered to be more malicious than stomach ulcers, one of which would be gastric cancer.
Heart - thoracic cavity
That is not a good thing. Do you have your period? Have you had your appendix taken out? Do you have a stomach ulcer? I would get that checked out.
A peptic ulcer is erosion in the lining of the stomach or the first part of the small intestine, an area called the duodenum. If the peptic ulcer is located in the stomach it is called a gastric ulcer.
Maybe a stomach ulcer, best get it checked out with a Doctor though who can tell you more.
The body cavity that would pass through a transverse section at the level of the umbilicus is the abdominal cavity. This cavity contains the digestive organs such as the stomach, intestines, liver, and pancreas.
The abdominal cavity
Ulcers can be caused by a bacteria called Helicobacter pylori (H. pylori). If this organism is present, the ulcer would be treated with a triple medication regimen; to include: Flagyl plus another antibiotic, antacids to neutralize acid in the stomach, a proton-pump inhibitor which will help heal an ulcer by decreasing acid production in the stomach, and Carafate which will coat an ulcer to allow it to heal.