esophageal cancer

Esophageal cancer is a common malignant tumor in humans, accounting for 2% of all malignant tumors and more than 90% of esophageal tumors. In retrospective surveys of deaths from all malignant tumors, it ranks second only to gastric cancer. It is estimated that approximately 200,000 people worldwide die from esophageal cancer each year. China is a high-incidence area for esophageal cancer, which is one of the most common malignant tumors that greatly endanger people's lives and health. The age of onset is mostly over 40 years, with a higher incidence in males than females. However, in recent years, there has been an increasing trend of onset in those under 40 years of age. The occurrence of esophageal cancer is related to chronic stimulation by nitrosamines, inflammation and trauma, genetic factors, as well as trace element content in drinking water, grains, and vegetables. However, the exact cause is not fully understood and requires further research.