Gastric Cancer Understanding Evolves with Focus on Stomach Microbiome
Current understandings of gastric cancer, commonly known as stomach cancer, may need to be redefined with a greater emphasis on the role of the microbiome within the stomach, researchers suggest. This shift in perspective could lead to improved prevention and treatment strategies for this often-deadly disease.
Gastric cancer primarily takes the form of adenocarcinoma, accounting for 98% of cases. Seoul Asan Hospital explains that this type of cancer originates in the cells lining the stomach and can spread through the layers of the stomach wall and to other parts of the body.
The development of gastric cancer is often a gradual process. It typically begins with superficial gastritis, a relatively mild inflammation of the stomach lining. If left unaddressed, this inflammation can progress to atrophic gastritis, where the stomach lining thins, and blood vessels become visible. Further progression can lead to intestinal metaplasia, a condition where stomach cells transform into cells more typical of the intestine, significantly increasing the risk of cancer development – by as much as tenfold.
One of the most significant factors influencing gastric cancer development is infection with Helicobacter pylori. This bacterium resides in the stomach lining and causes chronic inflammation, promoting changes that can lead to cancer. Health Chosun reports that individuals infected with H. Pylori should seek prompt treatment.
Family history also plays a role, with individuals having a first-degree relative with gastric cancer facing a two to three times higher risk. Regular screenings are crucial for those with a family history of the disease.
Symptoms of gastric cancer can be varied and often mimic less serious conditions. These can include abdominal pain, weight loss, blood in the stool or vomit, loss of appetite, abdominal discomfort, vomiting, indigestion, bloating, and anemia. Seoul National University Hospital notes that advanced gastric cancer may have spread beyond the stomach to nearby lymph nodes or other organs like the liver, pancreas, or spleen.
Early detection is key to successful treatment. In South Korea, more than 45% of gastric cancers are now diagnosed at an early stage thanks to increased endoscopic screening. Early-stage gastric cancer, where the cancer is confined to the lining or submucosa of the stomach, has a high cure rate – around 90% with appropriate treatment.
For those aged 40 and older, regular endoscopic screening every two years is recommended and available through the national health program. A diet rich in vitamins and fiber, particularly green and yellow vegetables, is also encouraged to protect the stomach lining. The findings highlight the importance of proactive health management and early intervention in combating this prevalent cancer.
