Characteristic _ symptom of cancer of colon

Characteristic _ symptom of cancer of colon
Cancer of colon is one of the common malignant tumour, have the highest morbidity with 40 years old - 50 years old age groups. According to epidemiology of the world's investigation, find the morbidity in North America, western Europe, Australia, New Zealand and other places of cancer of colon is the highest, the top two it occupy kinds of tumour on viscera,but in inferior, Latin America and other places morbidity getting getting lower more very.
The incidence and mortality of our country is lower than common malignant tumour such as gastric carcinoma, cancer of the esophagus, lung cancer. The regional materials reveal with the improvement of the living standards of the people, change of the diet structure in recent years, its morbidity presents every last trend year by year.
China and the intersection of large intestine and the intersection of cancer and morbidity of Japanese less than U.S.A. obviously, the intersection of immigrant and first generation to reach U.S.A. can see the intersection of large intestine and the intersection of cancer and morbidity rise, the second generation of morbidity basically close to Americans. From the viewpoint of epidemiology, the morbidity of cancer of colon is involved in environment, habits and customs, especially diet way.
It is generally acknowledged it is the main pathogenic factor that fatty recipe and cellulose are insufficient. Research reveals, the diet of the saturated fatty acid can increase the density of bile acid and neutral firm alcohol in colon, and change the composition of fungus group of large intestine. Bile acid apply, can turn into 3 - the intersection of methyl and the intersection of gallbladder and the intersection of anthracene,etc. and carcinogen by bacterium, firm the intersection of alcohol and ring can also apply by bacterium fragrant to take and form carcinogen. Food fiber include cellulose, pectin, half cellulose, lignin,etc., absorb the moisture, increase excrement and urine quantity, dilute the residue density in the intestines, can shorten the excrement and urine and reduce the time that the carcinogen contacts with the enteric mucous membrane through time of the large intestine, when the meal fiber is insufficient, it has already been one of the morbidity factors of cancer of colon.
Chronic large intestine inflammation, such as the intestinal cancer incidence of ulcer colitis is higher than the general crowd, in the evolution of increasing pathological change of the natural disposition of inflammation, can often form the polyp, further develop into intestinal cancer; Clone (Crohn) At the disease, have colon, person who gives much trouble rectum can cause canceration.
There are obvious differences between blood fluke's prevailing area and not incidence and mortality of cancer of colon of the prevailing area, thought the chronic snail fever patient in the past, because the intestines wall blood sucked the worm's ovum to deposit with the toxin amazingly, cause mucous membrane chronic ulcer of the large intestine, inflammation polyp,etc., and then cause the canceration. This view has been disputed, has controlled day by day according to snail fever of Jiashan county in Zhejiang Province, the example is obviously reduced to have illness coming on newly, the patient prones to disappearing in later period, and the morbidity of cancer of colon is still very high.
General materials statistics show, patient with colon polyp, the morbidity of cancer of colon does not have the colon polyp patient's 5 times. Family nature occuring frequently intestines interest sarcoma, the incidence of the canceration is higher.
In recent years, there are persons who reports positive family of cancer of colon to, its morbidity is a general crowd's quadruple, explain the morbidity that the inherent cause may participate in cancer of colon.
1,Patient mostly above middle age, but youth have, have illness coming on too, men and women than about 2: 1.
2,The change that early symptom is mainly the stool is used to, even if is secret and suffering from diarrhoea, or suffer from diarrhoea the fine jade of fine jade is replaced. The surface of excrement and urine often has a small amount of blood and mucus that are adhered to. Develop with the condition, have blood in one's stool and increase gradually, and the heavy sense after being urgent while having. Symptoms such as weight lightening, anaemia,etc. are presented the going on and aggravated. Can present symptoms such as jaundice, ascites, hepatomegaly, belly piece, intestinal obstruction, cachexia, sacral bone tail continuation pain, stool incontinence,etc. in later period. Cancer of colon generally grows slower, relatively shift late.
3,Besides above-mentioned symptom, on the basis of the cancerous swelling position, clinical manifestation is also different. Cancer of colon takes place at rectum and the second form colon at most, secondly and promote colon, transverse colon, spleen song and liver song for the caecum.
( 1) The left cancer of colon because second form colon is the narrowest and most small, and the excrement and urine of half a colon of left has already become the solid, so the left cancer of colon is mainly shown as chronic going on intestinal obstruction or obstinate constipation. Abdominal distension, abdominal pain, borborygmus are relatively obvious. Cancerous swelling can make the surface of stool adhere to the blood and mucus, the informal blood sometimes to break routedly. It is early and often apt to misdiagnose it for simple constipation.
( 2) Right half cancer of colon show as indigestion, right the intersection of upper abdomen and uncomfortable, the intersection of stool and abnormality, abdominal pain and belly lump mainly, the condition is developed gradually, present going on anaemia, becoming thin, generating heat,etc., it is often apt to misdiagnose for colitis, tuberculosis of intestine, chronic appendicitis, Crohn's disease and cholecystitis,etc..
( 3) Rectal cancer is mainly shown as number of times of the stool increases, the feeling that can't defecate clearly. The excrement and urine is attenuated, and there are blood and mucus. If cancerous swelling infringes the nerve of sacral bone clump, can present the sharp pain, can present intestinal obstruction in later period. Cancerous swelling can involve the bladder, prostate and female sex organ and present hematuria, polyuria and not urinate smoothly.
( 4) Rectum cancer is mainly shown as pain while having blood in one's stool and defecating. Cancerous swelling infringes the sphincter of rectum, can cause stool incontinence.
|