Adenocarcinoma is the most common type of rectal cancer, accounting for the vast majority of cases. Lymphoma, carcinoid, and sarcoma are other rare types of rectal cancer. Rectal bleeding, diarrhea, not being able to vacate the bowel completely, constipation, weight loss, bowel obstruction, small diameter tools, abdominal pain, and weakness are some of the most common symptoms of rectal cancer.
Before a patient with rectal cancer begins treatment, three important factors must be considered: the extent to which the tumor has spread, the involvement of lymph nodes, and whether the Whether or not the tumour has spread to other parts of the body. An adenomatous polyp, which is a collection of benign (noncancerous) cells, is the most common cause of colon cancer, or cancer that begins in the lower part of the digestive tract. The majority of these polyps will not turn malignant (cancerous), but some may do so over the course of 10-15 years.
Colon cancer is usually slow-growing, beginning as a benign polyp that develops into a malignant tumor. This process can go on for a long time without causing any symptoms. It can take years for colon cancer to be detected once it has developed.
A blockage or perforation in the bowel could cause severe abdominal pain. A growing tum can cause severe and long-lasting abdominal pain, bloating, and cramping.
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