The cause of disease of cancer of colon which are there to behave and how to diagnose? 's general knowledge

The cause of disease of cancer of colon, which are there to behave and how to diagnose? 's general knowledge
From what reason was cancer of colon caused?
Find clinically some factors may increase the danger that have illness coming on greatly. They include:
1.Age of onset, most patients have illness coming on after 50 years old.
2.Family's history: If somebody's first class relative, for example parents, have had and formed rectal cancer, it is critically ill and dangerous 8 times taller than the ordinary crowd that he suffers from this during all one's life. About 1/4 have illness coming on newly people have history of family which form rectal cancer.
3.The history of colon: If some the intersection of colon and disease clone disease or ulcer colitis might increase morbidity chance to form rectal cancer. The danger of their cancer of colon is 30 times of the ordinary person's.
4.Polyp: It is that pathological change was developed before cancer while as a child that most to form rectal cancer, they were known as the polyp. Among them a kind of polyp of fine hair galley proof adenoma is developed into cancer more easily, make the chance about 25% malicously; The cancerating rate of a kind of polyp of tube adenoma is 1-5%.
5.Genetic characteristic: Some family tumour syndromes, it is not disease, cancer of colon of the polyp such as heredity, can obviously increase the morbidity chance of forming rectal cancer. And it is younger to have illness coming on for time.
Which cancer of colon are to behave and how to diagnose?
Medical history and symptom:
The changes of the habits of defecating or excrement and urine properties, the majority is shown as number of times of the stool increases, shapeless or rare, the stool brought the blood and mucus. Constipation or diarrhoea and constipation are replaced sometimes, the stool is attenuated. Pain, lower abdomen of China, the intersection of intensity and weight differ, mostly secret anguish or bloated pain. Half a cancer of colon patient in right often finds lump of belly. Pay attention to having whole body symptom, tumour and necrosis such as greedy blood, becoming thin, weak, edema, low albumen blood disease or continuing while taking place and is infected with, the patient often generates heat.
The physical examination is found:
Can lay one's hand on and the intersection of belly and the intersection of bag and piece or mean intestines mean, find the intersection of bag and piece examine, it makes the intersection of piece and many quality to be hard with tenderness, shape abnormality. Anaemia, becomes thin, cachexia. The intravenous reflux of oppression of the person who accompanies lymphocytic transformation can cause ascites, the lower extremities edema, jaundice,etc..
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