An abdominal mass, or stomach mass, may develop due to injuries, benign tumors, malignant outgrowths or disease, states Healthline. This condition is generally detected during a routine medical check-up.
An abdominal mass is an irregular growth of tissue within the stomach cavity, characterized by a marked protrusion in the affected area. The abdominal region where the swelling occurs, including the firmness and consistency of the mass, are indicative of the possible causes of the stomach enlargement, notes the United States National Institutes of Health's MedlinePlus.
One of the factors associated with the development of an abdominal mass is the formation of cysts. These outgrowths, which are typically non-cancerous, are composed of fluid or infected matter. Some cysts that are likely lead to an abdominal mass include ovarian cysts, gallstones and uterine fibroids. Malignant tumors are also related to abdominal mass formation, including colon, renal, stomach cancer and liver cancer, which is said to cause a hardened, uneven mass in the right upper quadrant of the stomach.
Patients diagnosed with certain diseases and medical disorders may also develop an abdominal mass. These conditions include abdominal aortic aneurysm, Crohn's disease, bladder distention, diverticulitis, hydronephrosis, pancreatic abscess, spleen enlargement, liver enlargement, volvulus and ureteropelvic junction obstruction.
Abnormal visible protrusions in the stomach area should be promptly examined by a physician. Patients who experience a pulsating stomach mass accompanied by intense abdominal pain should seek emergency treatment, suggests MedlinePlus. This condition can be due to a ruptured aortic aneurysm.