Surgery to remove the cancer is almost always the first treatment.
Stage 0 Rectal Cancer
In this very early stage, the tumor is only on the inner lining of the rectum.
A surgeon can remove it or a small section of the rectum where the cancer is.
Your doctor may consider whether you can get radiation treatment, given either externally (beamed in from the outside) or internally (radioactive beads that go inside the rectum).
Stage I Rectal Cancer
This is another early form or limited form of cancer. The tumor has broken through the inner lining of the rectum but has not made it past the muscular wall.
Usually, doctors use surgery to remove the tumor.
If the tumor is small or you are very old or sick, doctors treat the tumor with radiation alone. This hasn't been as effective as surgery. Your doctor may add chemotherapy to give the radiation treatment a boost.
Stage II Rectal Cancer
At this stage, the tumor has gone all the way through the bowel wall and may have invaded other organs, like the bladder, uterus, or prostate gland. But it’s not in any lymph nodes (small structures throughout the body that make and store cells that fight infection).
- Surgery to remove all the organs involved with the cancer.
- Radiation with chemotherapy before or after surgery.
Stage III Rectal Cancer
In this stage, the tumor has spread to the lymph nodes.
- Surgery to remove the tumor
- Radiation with chemotherapy before or after surgery
- Chemotherapy, which may also be an option after surgery
Stage IV Rectal Cancer
The main treatment is chemotherapy, but your doctor may also recommend surgery to remove the tumor. Surgery is often used to relieve or avoid blockage of the rectum or to ward off rectal bleeding. It’s not generally considered to be a cure, though it may help someone with stage IV rectal cancer live longer.
If there are only one or two liver tumors, a surgeon may be able to remove them. Other options include freezing the tumors (cryosurgery) or destroying them with microwaves or heat (radiofrequency ablation).
Other nonsurgical treatments include giving chemotherapy directly into the liver using radioactive isotopes (radioembolization) or cutting off the blood supply to the tumor in the liver (embolization). Often, doctors give chemotherapy directly into the liver along with embolization. You may hear this called chemoembolization.
Recurrent Rectal Cancer
This means the cancer has come back after treatment, either in the same area or in a distant part of the body.
- Surgery to remove it if it’s in the same area as the original cancer. Studies show that this can help people live longer.
- If surgery can't remove all of the recurrences, many experts recommend chemotherapy with or without radiation. Sometimes, this shrinks the tumor enough for surgeons to remove it later.
You may also want to ask your doctor if there are clinical trials you could join. This is a way to try new treatments that aren’t yet available to everyone. Talk with your doctor about what you should consider first and how to find a clinical trial that would be a good fit for you.