What are the external factors that induce laryngeal cancer

The external factor that induces laryngeal cancer is smoking: smoking is closely related to respiratory tumors. Most laryngeal cancer patients have a long history of heavy smoking, and the incidence of laryngeal cancer is proportional to the daily smoking amount and the total smoking time. In addition, passive smoking cannot be ignored and may also cause cancer. When smoking, tobacco burns to produce tar, in which benzopyrene has a carcinogenic effect, which can cause mucosal edema, congestion, epithelial hyperplasia and squamous metaplasia, stop ciliary movement, and thus cause cancer.

The external factor that induces laryngeal cancer is drinking: According to surveys, drinkers have a 1.5 to 4.4 times higher risk of laryngeal cancer than non-drinkers, especially supraglottic laryngeal cancer, which is closely related to drinking. Smoking and drinking have a synergistic effect in causing cancer.

The external factor that induces laryngeal cancer is air pollution: long-term inhalation of industrial dust, sulfur dioxide, chromium, arsenic, etc. may lead to respiratory tract tumors. The incidence of laryngeal cancer is high in cities with serious air pollution, and urban residents have a higher incidence than rural residents.

External factors that induce laryngeal cancer are occupational factors: long-term exposure to toxic chemicals such as mustard gas, asbestos, nickel, etc.

The external factor that induces laryngeal cancer is viral infection: human papillomavirus (HpV) can cause laryngeal papilloma, which is currently considered to be a precancerous lesion of laryngeal cancer.

The external factor that induces laryngeal cancer is sex hormones: the larynx is a secondary sex organ and is considered a target organ for sex hormones. Male patients with laryngeal cancer are significantly more likely to be diagnosed than female patients. Clinical studies have found that the testosterone level in laryngeal cancer patients is higher than that in normal people, and the estrogen level is lower. Testosterone levels drop significantly after tumor removal.

The external factor that induces laryngeal cancer is trace element deficiency: certain trace elements are important components of some enzymes in the body. Their deficiency may cause changes in the structure and function of the enzymes, affect cell division and growth, and cause gene mutations.

The external factor that induces laryngeal cancer is radiation: long-term exposure to radioactive nuclides such as radium, uranium, radon, etc. can cause malignant tumors.