First Signs Of Stomach Cancer

According to the National Cancer Society, there were 21,130 cases of stomach cancer in the U.S. in 2009. There are no known exact causes of stomach cancer. Things that increase the risk of gastric cancer include peptic ulcers caused by H. pylori bacteria, inflammation of the stomach, smoking, a family history of stomach cancer, and a lack of exercise, a poor diet and obesity. Early stomach cancer often does not cause symptoms, but symptoms increase as the cancer grows, according to the American Cancer Society. Read more..

Gastric Cancer Risk Depends Heavily on the Coevolution Between Humans and Bacteria

"The historical geographic movement of populations continues to influence health and cancer risk in modern Americans," the authors noted in the paper, which was published in January in Proceedings of the National Academy of Sciences. "These data provide a remarkable example of coevolution between humans and the natural world; in particular, the microbial environment," said Jay Dunlap, PhD, chair of the Department of Genetics and a professor of genetics and of biochemistry. Williams, who studies diseases that are differentially distributed among human populations, uses the tools of evolutionary biology to examine the role that genetics plays in health disparities. He has often conducted research on genetic variation within Africa, especially as it relates to diseases that affect people of African descent more frequently than other populations. His work, he said, "has helped to illuminate human evolutionary history and serves to bring disease presentation into an evolutionary perspective." The research in Colombia, for example, may help explain why the rate of gastric cancer is relatively low in Africa despite the high rate of infection with H. pylori, a phenomenon referred to as the "African enigma." "Dr. Read more..

Cancer risk to decline thanks to drop in h. pylori infection

With a drop in the infection rate of helicobacter pylori, the incidence of stomach cancer, which is the most common type of cancer among Korean men (second common overall including both men and women), is also expected to significantly decline in tandem. According to a research paper entitled The infection rate of helicobacter pylori and risk factors among Koreans for 13 years" published on Wednesday by a research team led by Prof. Kim Na-yeong at Seoul National University Bundang Hospital, the infection rate dropped by 12.5 percentage points from 66.9 percent in 1998 to 54.4 percent in 2011. The research team surveyed helicobacter pylori infection among 10,796 men and women aged 16 or older who had health checkup at medical institutions nationwide in 2011, and compared the data with those of 1998 and 2005. According to the paper, the risk factors that illustrate the possibility for helicobacter pylori infection were male, advanced age, high cholesterol level, low income level, and residency in rural areas. In fact, in the 2011 statistics, the infection rate among males stood at 57.1 percent, 5.9 percentage points higher than 51.2 percent among females. Read more..