(1) Abdominal pain and symptoms of organic process tracts: the overwhelming majority of carcinoma patients have totally different degree of abdominal pain or abdominal discomforts, like abdominal hidden pain, left aspect abdominal distention, nausea, vomiting, loss of craving so on. once food feeding, the symptoms could exasperate and generally could company with intervallic diarrhoea or constipation, that square measure simply confused with the common diseases of right lower quadrant, like chronic rubor, ileocecal infectious disease, ileocecal junction segmental rubor or malignant neoplastic disease. it's typically believed that the symptoms of rightward abdomen carcinoma manifest as pain within the half higher than navel; whereas symptoms of leftward abdomen carcinoma manifest as pain within the half underneath t navel. If cancer tumour penetrates internal organ wall, it's going to cause native inflammatory adhesion or native symptom once the formation of chronic perforation. the placement of pain is simply the place wherever tumour localizes.
(2) Abdominal mass: it's sometimes irregular and in exhausting texture; its surfaces manifest nodosity; throughout early stage of colon cancer and colon cancer, abdomen mass encompasses a bound activity and should cause pain even press it slightly.
(3) Changes of movement and stool shape: this is often attributable to ulceration or infection caused by tumour sphacelus. as a result of poisonous substance stimulates colon to vary gut evacuation habit: increase or cut back the numbers for gut evacuation; alternate prevalence of diarrhoea and constipation, or prevalence of abdominal intestinal colic before gut evacuation and at that time, it might alleviate. If the position of tumour is underneath or simply localizes body part, then some body part irritation could seem, like porta bearing-down pain, troublesome laxation. Dejecture usually manifests as shapeless like pasty, and is mixed with mucous secretion and bloody pus. Sometimes, great deal of blood content could mislead the diagnosing as infectious disease, enteritis, hurt of haemorrhoid so on.
(4)Anaemia and absorption of chronic toxins: once the surface of tumour sphacelus seems ulceration, the colon could suffer from unceasingly capillary hemorrhage. Blood being mixed with dejecture could fail to catch the eye of carcinoma patients. However, anaemia, emaciation, weakness or weight loss is also caused attributable to chronic blood loss, poisonous substance absorption or deficiency disease. Advanced stage carcinoma patients could suffer from lump, megalohepatia, ascites, symptom, cachexy so on. If tumour penetrates abdomen or bladder or different organ and cause internal fistula, then similar symptoms shall be conjointly caused.
