Metastasis occurs when cancer has spread to other parts of the body
When colon cancer spreads, it More frequently is that it spreads to liver, although sometimes it can pass to the lungs, bones and other organs of the body.
What Causes Metastasis in Colorectal Cancer?
The exact cause is not known, but cancer is more likely to spread if it is in an advanced stage when it is first diagnosed.
Cancer cells are sometimes too small to be detected by tests.
These cells can continue to grow and later appear as metastatic cancer, even years after it has been treated.
Types of colorectal cancer metastases
Metastasis to other organs
Metastasis of colorectal cancer to other organs occurs mainly to the liver. About half of colorectal cancer patients develop liver metastases.
- Lymphatic metastasis
It is the main type of metastasis associated with colorectal cancer. It usually occurs at lymph nodes closer to the site of the primary tumor, however in some patients from these nodes it can spread to others further away.
It occurs when cancer cells reach the liver through the portal vein and then the lung, brain, bones, and so on.
What are the symptoms?
Some people do not have any symptoms, although sometimes if the cancer has spread, various symptoms may appear depending on the location of the cancer. If it has spread to:
- the lymph nodes of the abdomen may occur bloating and loss of appetite.
- to the liver It can exist pain in the upper right part of the abdomen, abdominal distension and loss of appetite.
- the lungs, may cause cough, difficulty breathing and that the subject spit blood.
- the bones, may cause pain in the bones, especially in the back, hips and pelvis.
- to the brain, this can cause problems with memory, the concentration, he Balance or the movement.
How is metastatic colorectal cancer diagnosed?
It is diagnosed by a Physical exam and various tests, including blood test, chest x-rays, Bone scintigraphy, ultrasound, TAC, PET me magnetic resonance.
The diagnosis is confirmed with a biopsy.
During this test, the doctor will take tissue samples from areas that do not go normal, to later examine it under a microscope to see if they contain cancer cells.