The digestive system takes in nutrients vitamins , minerals , carbohydrates , fats, proteins , and water from foods and helps pass waste material out of the body. The digestive system is made up of the esophagus , stomach , and the small and large intestines. The colon large bowel is the first part of the large intestine and is about 5 feet long. Together, the rectum and anal canal make up the last part of the large intestine and are inches long. The anal canal ends at the anus the opening of the large intestine to the outside of the body.
If You Have Anal Cancer
Rectal cancer - Symptoms and causes - Mayo Clinic
The symptoms of colorectal cancer may not develop until the disease has progressed into stage II or beyond. Talk with your doctor about when you should start regular colorectal cancer screening. Several tests may be used to diagnose colorectal cancer. In many cases, a biopsy may be required. These imaging and laboratory tests may also be used to track the size of tumors and monitor response to treatment.
The rectum is the last several inches of the large intestine. Rectal cancer starts in the lining of the rectum rectal mucosa. It starts at the end of the final segment of your colon and ends when it reaches the short, narrow passage leading to the anus. Cancer inside the rectum rectal cancer and cancer inside the colon colon cancer are often referred to together as "colorectal cancer. While rectal and colon cancers are similar in many ways, their treatments are quite different.
Anal cancer is a type of cancer that forms in tissues of the anus. The anus is the opening of the rectum to the outside of the body and at the end of the GI tract. Sometimes anal cancer causes no symptoms at all. But bleeding is often the first sign of the disease.