Risk Factors for Esophageal

The most common etiology of esophageal SCC, as alcohol and tobacco use, nutrition and environmental factors, genetics and the Human Papilloma Virus (HPV) is observed. Predisposing factors of esophagitis, esophageal stasis syndrome, achalasia, caustic burns, alkali corrosion, diverticulum, Plummer-Vinson syndrome, celiac disease, previous gastric resection, previous radiotherapy include app. ADC in the etiology of gastroesophageal reflux disease, Barrett's esophagus, smoking and obesity play a role.

Alcohol and tobacco: the use of alcohol and tobacco in America, Europe and especially France, the most important etiological factor. In chronic smokers who consume alcohol have an increased risk of 20-25, according to times. Tobacco use increases the risk 2-6 fold. With the termination of the use of tobacco, the risk declines by 40%. Strengthen each other's effect when used with alcohol and cigarettes, increase the risk 10-25 times.

Nutrition: Another common feature is the high-risk areas, rich in cereals, whereas the A, C, vitamin E, folic acid, riboflavin, animal protein, fat, fresh fruit and vegetables, lack of or poor nutrition. High vitamin C, beta-carotene are yellow and green vegetables reduces the incidence of SCC.

Carcinogenic substances formed by means of microbial contamination in some foods directly by taking the risk is increased. For example, when corn infected with fungi is composed of nitrosamine derivatives. In addition, the sheer number of vegetables are carcinogenic effect of the molds, and particularly increases the risk of SCC.

Significantly increases the risk of excessive hot food to be continuous.

Trace element deficiencies have also played a role in the empirical studies. One study demonstrated the protective effect of molybdenum-rich diet. In another study, zinc plays a role in epithelial differentiation, cytochemistry events shown to be effective. In addition, zinc deficiency in guinea pigs esophageal mucosa, such as the epithelial changes consisted of hyperkeratosis and acanthosis. Sauvaget and regions with high incidence of SCC zinc, selenium, and reported low levels of molybdenum.

Inheritance: China and Iran, especially in an area north-east of the incidence of esophageal cancer suggests a hereditary factor may be. Also known as hand-foot Plantaris, which leads to an autosomal dominant inherited disease, esophagus cancer by 1 / 3 is observed. Esophageal cancer, one showing the genetic relationship, the best example.

Esophageal cancers, 2 / 3 of the p53 mutation, but the most important oncogene in the pathogenesis cyclin.

Human papillomavirus (HPV): Especially with high-incidence regions of China and South Africa, 40-In 60% of patients with HPV DNA found in SCC. HPV16 and HPV18 may play a role in some cases, esophageal SCC.

Celiac disease: usually increases the incidence of gastrointestinal cancer and lymphoma. Considered to be due to lack of trace elements and vitamins.

Plummer-Vinson (Patterson-Kelly) syndrome: atropine glossopati, dysphagia, and severe iron deficiency anemia seen in this syndrome, especially in the upper esophagus and mouth to develop cancer by 10%.

Achalasia: 30-fold increased risk in these patients with the incidence of SCC is usually placed in the middle of the esophagus ranged from 1-20%.

Diverticula: 0.3-0.7% patients, usually after age 60

percent may develop cancer.

Esophagitis: Extremely hot foods causes chronic esophagitis. This is seen in patients with SCC, especially in the middle and lower esophagus.

Esophageal strictures: as a result of burns due to caustic substances strictures, the risk of SCC increase 20-fold compared to ordinary people. Caustic burns to occur increases, especially in the age of cancer occurrence time is reduced. Food stasis occurs as a result of strictures. Before extending the duration of the contact you have with this nitrozaminlerle esophagitis, after many years can cause epithelial hyperplazisine.

Previous gastric resection: pre-partial gastrectomy in people who would be an increase in the incidence of lower esophageal SCC. The reason for this poor-poor nutrition, and gastroesophageal reflux. The latent period for the formation of cancer in approximately 20-25 years.

Previous radiation therapy: the cervical spine, breast and thyroid after radiotherapy may develop SCC. Period of 50 years, sometimes with the irradiation of cancer development can pass.

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