What _ symptoms of pathological change before cancers does the stomach have

What _ symptoms of pathological change before cancers does the stomach have
Pathological change, was also called the previous disease of cancer, meant if patients presented these diseases or clinical states before cancer of the stomach, suffering from the danger of gastric carcinoma will obviously increase. Pathological change includes chronic withering gastritis, stomach polyp, gastric ulcer and stomach excised the postoperative incomplete stomach mostly before cancer of the stomach.
1 chronic shrinking gastritis
The experiment proves, the wall cells in the mucous membrane of stomach wither, the gastric acid secreting amount is reduced, favorable to the reproduction of the positive bacterium of nitrate reductase in the stomach, thus the one that promoted the inferior nitre amine compound in the stomach is endogenous synthetic, increase the density of carcinogen in the stomach in this way. In addition, the chronic withering gastritis patient's stomach empties time to lengthen, has increased in carcinogen and stomach mucomembranous contact time, thus has increased the danger that gastric carcinoma takes place. The statistical data shows, the canceration rate of the chronic shrinking gastritis is 12% - 71% .
2 stomach polyp
The statistical data shows, the canceration rate of the stomach polyp is 0% - 50%. The canceration rate of the occuring frequently polyp is higher than the single shot polyp, the canceration rate of the adenoma polyp is higher than the inflammation polyp. Greater than 2 centimetres and person who doesn't have base of a fruit of wide base as to the polyp diameter, because its easy canceration, should perform the operation and excise positively.
3 gastric ulcer
Experiment prove while repeated inflammation stimulates and repairs leather cell at the the intersection of stomach and mucous membrane around the ulcer, regenerated upper leather cell apt to suffer carcinogenic stimulus of factor and the canceration takes place. The statistical data shows, the canceration rate of gastric ulcer is 1% - 5%.
4 stomach excises the postoperative incomplete stomach mostly
Do because of stomach or duodenum benign disease stomach excise postoperative mostly, because of lose the intersection of pylorus and shrink function of sphincter, the duodenum content thing returns to and flows into the stomach, has destroyed the lipoprotein floor on leather surface on the mucous membrane of stomach, thus has reduced mucomembranous function of protective screen of the stomach; Secondly, after excising the stomach sinus, the secreting amount of gastrin is reduced, has weakened leather nutrition and protective screen function on the mucous membrane of stomach greatly; In addition, after the intersection of stomach and sinus excision, gastric acid secrete reduce, help the intersection of nitric acid and the intersection of reductase and positive growth of bacterium breed, the ones that have promoted inferior nitre amine in the stomach are synthetic, make the density in the stomach of inferior nitre amine of carcinogen increase. All these things, have increased the danger of suffering from gastric carcinoma. The statistical data shows, the incidence of the incomplete gastric carcinoma is 0.5% - 6% .
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