Colon cancer is also known as colorectal cancer. cancer is caused due to the uncontrolled cell growth in the rectum part of large intestine. The generally observed symptoms of cancer are rectal bleeding, anaemia which causes changes in bowel habits along with body weight loss. Other symptom of colorectal cancer includes worsening constipation, loss of appetite, and blood in the stool, nausea and loss of weight. This is most observed in higher age group people who are above the age of 50 years. The main root of cancer is spread with the consumption of alcohol, intake of red meat, smoking, and lack of physical exercise.
cancer is curable through surgery if it is confined within the wall of colon, but once it starts spreading around the body it becomes difficult to cure. The estimated life given by the United States to patient suffering through colon cancer is five year if left untreated, and the five year survival rate is 65% as given by the United States. These days, natural cure for colon cancer is also available.

Colon or colorectal cancer is diagnosed through tumor biopsy which is done during sigmoidoscopy, or colonoscopy which again depends on the location of the lesion. A CT scan of patient's chest, pelvis and abdomen is done which helps in the detection of the extent of disease in the patient's body. In some cases test like PET and MRI are also done if the condition of the patients demands so. The next step in the process of diagnosis is the cancer staging which helps in determining that how much the tumor has spread initially and whether lymph nodes are involve or not, and if involved how many metastases are formed. This cancer staging is done on the basis of the TNM system. Stages of diagnosis along with the colon cancer staging also include:
Macroscopy which focus on the appearance of the inside of the colon which shows one invasive colon carcinoma i.e. the cater-like, irregular in shape, reddish tumor.
Microscopy depicts out of the three degrees of differentiation of the adenocarcinoma: well, moderate or poor, which degree the patient is in. adenocarcinoma is the malignant epithelial tumor which is originated from the glandular epithelium of the colon mucosa.
Tumor budding divides people into the risk categories more efficiently than the TNM system and also potentially helps patients in guiding them with the treatment decision.

The colon can be prevented by increased surveillance along with some necessary changes in the lifestyle of people. The diet necessary for the prevention of the natural cure for cancer include more consumption of whole grains along with fresh fruits and vegetables and reduction in the intake of red meat. Physical activity can also help in reducing the risk of cancer. Suggested medication includes Aspirin and Celecoxib which helps in decreasing the risk of colon cancer. After attaining the age of 50, various medical societies' advise their patients to go for screening which helps in the diagnosis of colon cancer so that the best possible treatment can be provided along with proper medication.