Causes and Risk Factors for Gastric (Stomach) Cancer
Gastric cancer, also known as stomach cancer, is caused by various factors. Here are some of the main causes:
- Chronic inflammation: Long-term inflammation in the stomach can increase the risk of developing gastric cancer. Conditions such as chronic atrophic gastritis, atrophic gastritis with intestinal epithelial hyperplasia, and heterotypic hyperplasia are associated with an increased risk.
- Helicobacter pylori infection: Infection with the bacteria Helicobacter pylori is a major risk factor for gastric cancer. This bacterium can cause chronic inflammation in the stomach lining, leading to the development of cancerous cells over time.
- Unhealthy diet: Certain dietary factors can contribute to the development of gastric cancer. A diet high in salty and fermented foods, as well as a lack of fruits and vegetables, has been linked to an increased risk.
- Poor environmental conditions: Exposure to certain environmental factors, such as pollution or toxins, may increase the risk of gastric cancer.
Understanding these causes can help raise awareness and promote preventive measures for individuals at higher risk.
Non-modifiable risk factors for gastric cancer include:
- Age: Increasing age is a non-modifiable risk factor for gastric cancer. Gastric cancer is more common in people over the age of 50. The likelihood of being diagnosed with gastric cancer increases as a person gets older.
- Genetics: Genetic predisposition plays a role in the development of gastric cancer. People with a positive family history of gastric cancer are at higher risk.
- Race or Ethnicity: Certain racial and ethnic groups have a higher risk of developing gastric cancer. For example, Indigenous people, Native Americans, and Black individuals have higher rates of gastric cancer compared to other populations.
It is important to note that while these non-modifiable risk factors increase the likelihood of developing gastric cancer, they do not guarantee that an individual will develop the disease. Regular screenings and early detection can help in managing the risk associated with these factors.
Modifiable risk factors for gastric cancer are factors that can be changed or modified through lifestyle choices or interventions. These factors have been linked to an increased risk of developing gastric cancer. Here are some modifiable risk factors for gastric cancer:
- H. pylori infection: H. pylori is a type of bacteria that can infect the stomach lining and cause inflammation. Chronic H. pylori infection is a known risk factor for gastric cancer. It is important to note that not everyone with H. pylori infection will develop gastric cancer, but treating the infection can reduce the risk.
- Smoking: Smoking tobacco is a significant modifiable risk factor for various types of cancers, including gastric cancer. The chemicals in tobacco smoke can damage the cells lining the stomach, increasing the risk of developing cancer.
- Diet and lifestyle choices: Certain dietary and lifestyle factors have been associated with an increased risk of gastric cancer. These include:
- High intake of salty and processed foods: Consuming foods that are high in salt or preserved through methods like smoking, pickling, or curing may increase the risk of gastric cancer.
- Low intake of fruits and vegetables: A diet low in fruits and vegetables, which are rich in vitamins, minerals, and antioxidants, may be associated with a higher risk of gastric cancer.
- Obesity: Being overweight or obese has been linked to an increased risk of various types of cancers, including gastric cancer.
- Physical inactivity: Lack of regular physical activity may contribute to an increased risk of gastric cancer.
- Alcohol consumption: Excessive alcohol consumption has been associated with an increased risk of various cancers, including gastric cancer. It is important to note that moderate alcohol consumption is generally considered safe.
It's worth mentioning that these modifiable risk factors do not guarantee the development of gastric cancer but rather increase the likelihood. By making positive changes in lifestyle choices and addressing these modifiable risk factors, individuals can potentially reduce their risk of developing gastric cancer.
To prevent or reduce the chances of getting gastric cancer, there are several actions a person can take to modify their risk factors:
- Maintain a healthy weight: Losing excess weight and maintaining a moderate weight through diet and exercise can help reduce the risk of developing gastric cancer.
- Exercise regularly: Engaging in regular exercise has been shown to lower the risk of various types of cancers, including gastric cancer. Aim for at least 150 minutes of moderate-intensity exercise per week.
- Follow a healthy, balanced diet: A diet rich in fruits, vegetables, and fiber is associated with a lower risk of gastric cancer. Include plenty of colorful fruits and vegetables in your meals, as they contain important vitamins and antioxidants that help protect against cancer.
- Limit alcohol consumption: Excessive alcohol use has been linked to an increased risk of gastric cancer. It is recommended to limit alcohol intake or eliminate it altogether.
- Quit smoking: Smoking is a known risk factor for many types of cancers, including gastric cancer. If you smoke, quitting is one of the best things you can do for your overall health and to reduce your risk of developing cancer.
- Reduce processed meat and salted food intake: Processed meats and foods high in salt have been associated with an increased risk of gastric cancer. Try to limit your consumption of processed meats like hot dogs and deli meats, as well as salty foods.
- Treat H. pylori infections: Helicobacter pylori (H. pylori) infection is a bacterial infection that can increase the risk of developing gastric cancer. If diagnosed with H. pylori infection, it is important to receive appropriate treatment with antibiotics as recommended by your healthcare provider.
- Consider genetic testing: People with a family history of hereditary diffuse gastric cancer (HDGC) may benefit from genetic testing. If genetic testing reveals a CDH1 gene mutation, doctors may recommend complete surgical removal of the stomach (total gastrectomy) due to the significantly increased risk of developing stomach cancer. However, this decision should be carefully considered as it can have significant impacts on eating habits and quality of life.
It's important to note that while these actions can help reduce the risk of developing gastric cancer, they do not guarantee complete prevention. It's always best to consult with your doctor or healthcare provider for personalized advice and recommendations based on your individual health history and risk factors.