Is gastric cancer with liver metastasis contagious?

Is gastric cancer with liver metastasis contagious? As the saying goes, "Nine out of ten people have stomach problems." Stomach discomfort, stomach acid, and bloating have become common problems for modern people. Statistics show that about 170,000 people die of gastric cancer in my country each year, which is almost 1/4 of all deaths from malignant tumors. A recent study by Kyushu University in Japan found that gastric cancer is not only closely related to people's eating habits, but is also a contagious disease.

Is gastric cancer with liver metastasis contagious? Cancer is not a metastatic disease, so even if it metastasizes to the liver, it is not contagious.

Gastric cancer is one of the most common malignant tumors in my country, and its incidence rate ranks first among all tumors in my country. Among the malignant tumors of the stomach, adenocarcinoma accounts for 95%. It is also the most common digestive tract malignant tumor, and even ranks among the top of all human malignant tumors. Early gastric cancer is mostly asymptomatic or has only mild symptoms. When clinical symptoms are obvious, the disease is already in the late stage. Therefore, we must be very vigilant about the early symptoms of gastric cancer to avoid delaying diagnosis and treatment.

The stomach is located in the upper abdomen of the human body and is shaped like a "J". It is an important organ for digesting food. Gastric cancer can occur in any part of the stomach and the development process may take many years.

The symptoms of gastric cancer and precancerous lesions are subtle and non-specific, so early gastric cancer is difficult to detect. In fact, only 5% to 10% of gastric cancers in my country can be diagnosed at an early stage.

The mortality rate of gastric cancer in my country is 25.2/100,000 (male: 32.8/100,000, female: 17.0/100,000), accounting for 23.2% of all malignant tumor deaths, ranking first in malignant tumor deaths. (Male is 1.9 times that of female). The world population-adjusted mortality rate of gastric cancer in China is: male: 40.8/100,000, female: 18.6/100,000, which are 4.2-7.9 times and 3.8-8.0 times that of developed countries in Europe and America, respectively. There are obvious regional differences and urban-rural differences in the incidence of gastric cancer in my country. A nationwide sample survey of 263 sites showed that the adjusted mortality rate of gastric cancer was between 2.5 and 153.0/100,000, with urban and rural areas being 15.3/100,000 and 24.4/100,000, respectively, and the latter being 1.6 times that of the former. The pathological type of gastric cancer is mainly adenocarcinoma. Other types of gastric cancer include squamous cell carcinoma, adenosquamous carcinoma, carcinoid, small cell carcinoma, etc. The latter types are less common, and there are differences in the treatment of different types of gastric cancer.

The incidence of gastric cancer in China is highest in the northwest, followed by the northeast and Inner Mongolia, followed by the east China and coastal areas, and lowest in the central and southwestern regions. About 170,000 people die of gastric cancer each year, which is almost 1/4 of the total number of deaths from malignant tumors. In addition, more than 20,000 new gastric cancer patients are born each year. Gastric cancer is indeed a disease that seriously threatens people's health. Gastric cancer can occur at any age, but it is more common in people aged 40 to 60, with men outnumbering women by about 2:1. The cause of the disease is unknown, and it may be related to a variety of factors, such as lifestyle, diet, environmental factors, genetic quality, and mental factors. It is also related to chronic gastritis, gastric polyps, gastric mucosal dysplasia and intestinal metaplasia, residual stomach after surgery, and long-term Helicobacter pylori (HP) infection. Gastric cancer can occur in any part of the stomach, but it is more common in the gastric antrum, especially the lesser curvature of the stomach. According to the depth of infiltration of cancer tissue, it is divided into early gastric cancer and advanced gastric cancer (mid- and late-stage gastric cancer). The early symptoms of gastric cancer are often not obvious, such as elusive upper abdominal discomfort, dull pain, belching, heartburn, loss of appetite, mild anemia and other symptoms similar to gastric duodenal ulcer or chronic gastritis. Some patients experience pain relief or relief after taking painkillers, anti-ulcer drugs or adjusting their diet, so they are often ignored and not further examined. As the disease progresses, stomach symptoms gradually become more obvious, including upper abdominal pain, loss of appetite, emaciation, weight loss and anemia. In the later stage, there are often metastasis of cancer, abdominal masses, enlarged left supraclavicular lymph nodes, black stools, ascites and severe malnutrition. Since gastric cancer is extremely common and harmful in my country, relevant studies believe that its cause is related to eating habits, gastric diseases, etc., so understanding the basic knowledge about gastric cancer is of great significance for gastric cancer prevention and treatment.

The researchers conducted a 14-year follow-up survey of more than 1,000 middle-aged men. During the survey, a total of 68 people were diagnosed with gastric cancer. After excluding other factors that affect the incidence of gastric cancer, the researchers found that the risk of gastric cancer in people infected with Helicobacter pylori is 2.7 times that of uninfected people; the risk of smokers is 1.8 times that of non-smokers; the risk of gastric cancer in people with both is 11.4 times that of people who are neither infected nor smokers. The researchers pointed out that Helicobacter pylori can cause gastritis and peptic ulcers, and this orally transmitted bacterium has turned gastric cancer into a contagious disease.

As early as 1994, the World Health Organization classified Helicobacter pylori as a Class I (i.e. confirmed) carcinogen. As a country with a high incidence of gastric cancer, it is not surprising that Japan has such research data. In addition to the effects of Helicobacter pylori and smoking on gastric cancer, high-salt diet and drinking can damage the gastric mucosa and make it more susceptible to carcinogens.

Sharing meals and not paying attention to dietary hygiene and regularity will increase the chances of infection with such bacteria, leading to a high incidence of gastric cancer. "Modern people live irregular lives, and when they dine together, they prefer smoked, strong-flavored, spicy foods, and smoke and drink at the same time, which are the culprits of gastric cancer. Liaoning Zhuanghe, Shandong Linqu, and Fujian Changle are all high-incidence areas for gastric cancer in my country. Among them, people in Fujian Changle have the habit of eating fish sauce. This small salted fish is very salty. Long-term consumption will directly damage the gastric mucosa and its protective function, making gastric cancer difficult to get rid of. Overall, the incidence of gastric cancer in men is about twice that of women, and it is more common in people aged 40-60. Middle-aged men are a high-risk group for gastric cancer.