The outbreak reason of the stomach cancer

The cause of disease of stomach cancer distributes till geography of the stomach cancer outbreak and with emigrant the research of relation, generally think establishing relationship of outside environment and food factor and stomach cancer most closely, the human body hasn't completely clarified now.Pass to have some benefits to still at the stomach cancer occurrence of condition, also allow of no to neglect.
(A)inherit a factor
Clinical workers all once met a circumstance that more than two members in household got stomach cancer, although the tendency of this kind of good hair stomach cancer is very seldom seen,hinted to have the possibility of heredity factor at least.Have a data report the outbreak rate of stomach cancer in the relatives of the way stomach cancer sufferer want to be higher than matched control 4 times.In the middle of inheritting a factor, not a few authors notice the relation of blood type.Someone statisticses, the stomach cancer outbreak rate of A type has to be more 20% in height than the person of other blood types.But also have some stomach cancers incidence rates that the reports think a different blood type and make no difference.Someone studies the relationship with HLA of the outbreak of stomach cancer and needs to be done a conclusion further in recent years.
(Two)geography environment factor
The survey of the international community agree with stomach cancer Epidemiology expresses that different region and the stomach cancer outbreak rate of race exist obvious difference.These difference possibilities have something to do with heredity and environment factor.
Some data explains that the stomach cancer delivers the Wu high degree of latitude region more and is apart from more far nation in the equator, the outbreak of stomach cancer leads more high.The data thinks that its outbreak has something to do with circumlittoral factor.There is the factor that the different food is used to here, should also consider geochemistry factor and exist carcinogen in the environment of possibility.
The national stomach cancer synthesized investigation Epidemiology set to once investigate local stomach cancer Gao Fa region, if Qi connect flowed the river west orchid river downstream in hallway, yellow river upper stream and Yangtze River downstream, Fujian province river's and wood of river system and went the mountain south segment too much inside the mountain etc. ground, detection in addition to going the mountain south segment as metamorphic rock too much, rest is volcanic rocks, Gao
Peat, part or it a side deeply and greatly broke a layer, Ca in waterSO4 the specific values are small, but Nie and selenium and drill a content Gao.The investigation set still investigates the stomach cancer low hair
The region fastens etc. ground and discovers that that area is a limestone district such as upper stream in Yangtze River and Pearl River water, didn't deeply and greatly break a layer, Ca in waterSO4 the specific values are big, the Nie, selenium and cobalt content are low.Have already known to have in the volcanic rocks 3, 4 benzenes combine Bi and have unexpectedly to be up to 5.4~6.1 μ gskg, organic nitrogen waits second nitric An in the peat
The ex- body content is higher and make the stomach glued a film easily occurrence harm.In addition, selenium and cobalt can cause stomach damage, the Nie can promote 3, 4 benzenes combine the cancer-causing function of Bi.Whether above geography environment factor is local formation these stomach cancer Gao Fa region's reason is worth investigating further.
(Three)food factor
The food factor's influence toward stomach cancer outbreak has already been subjected to the worker's value of tumor researches in all countries.Possible food cancer-causing factor for usually eat to smoke, roast Zhi food(contain benzene combine Bi) or pickle food, sour pickled cabbage.(contain N-second nitric radicle compound)The research in recent years put forward a protection factor again, like milk, animal egg white, fresh vegetable and some fruit etc.s.Japan and descending of American stomach cancer outbreak rates are all been returned to the improvement of food circumstance recently.But food relationship with tumor and it causes cancer the research of mechanism is very and complicated.In the food since the possible existence contains the carcinogen of direct function, in spite of is natural existence or in the food cooking, process, store process in output;The food after absorbing the human body may also form a carcinogen under some factor functions inside the body.In the cancer-causing process, have of the material have a start carcinogen of function, have of urged a cancer or suppress a cancerous function, and returned to convert process intertexture with complicated metabolism inside the human body, living creature together, therefore find out affirmative contact from these complicated factors very much.Testing the data can be used for evaluating food and metabolism factor in mankind's stomach cancer nascent function, such as its result and the Epidemiology proof mutually consistent, it just takes person's letter as a result.
The our country stomach cancer synthesizes an investigation Epidemiology's set high to the local stomach cancer, the survey result of low outbreak area express that stomach cancer and food contain close relation.Induct the experiment of big white rat liver cancer in the miscellaneous color song syphilis vegetable in, once saw the occurrence of gastric gland cancer.Can check a miscellaneous color song from the main non-staple foodstuff of the survey region and the stomach liquid of the sufferer fungi and reach a nest song mildewed etc. fungi, a rate of checking of stomach cancer Gao Fa region is more obviously high than a low hair region, can hint that the mildewed food is the dangerous factor that 1 has something to do with stomach cancer.
The salt Zi of the high salt the food is thought to is another dangerous factor of stomach cancer occurrence.Our country stomach cancer region residents' everybody of Gao Fa annually shoots salt to measure be above for 9 kgs, but the amount of salt of shooting of low residents in the hair region then is 4~7.5 kgs.The food species that contrasts a survey and still discovers stomach cancer Gao Fa region is much more pure, while the non-staple foodstuff category of low hair region is many, the absorbing of fresh vegetable, bean and animal egg white quantity is also many, this possible enunciation stomach cancer has something to do with nourishment vegetable losing balance.Investigate a statistics to hint that the fresh vegetable takes a meal quantity and stomach cancer to adjust death rate to present in addition negative related, can think that the fresh vegetable is a kind of protection factor.The fresh vegetable is rich to contain vitamin A, C and mineral quality.Vitamin AN and the top skin rebirth and maintain its normal function relevant, gaining a living the difficult plain C can stop second nitrate and Zhong An to synthesize a second nitric radicle in the stomach compound.Have already confirmed that iron lacks and the Ｐ lummer-Ｖｉ nso the ｎ is comprehensive to advertise for relevant, the latter and oesophagus have relation with the occurrence of the stomach cancer, past iron lacks to have an indirect relation with the outbreak of stomach cancer.