Cancer and lymphoedema. Lymphoedema may develop when a cancer blocks a lymph node or some lymph vessels. Or it can happen if you have treatment for cancer that removes or damages part of the lymphatic system. Surgery and radiotherapy to the lymph nodes can cause lymphoedema.n some types of cancer, doctors now do a test called a sentinel node biopsy. This can reduce the need to remove all the lymph nodes, which helps to reduce the risk of lymphoedema. The sentinel node is the first lymph node (or first few nodes) that fluid drains to from the area of the tumour.
A polyp is an extra piece of tissue that grows inside your body. Colonic polyps grow in the large intestine, or colon. Most polyps are not dangerous. However, some polyps may turn into cancer or already be cancer. To be safe, doctors remove polyps and test them. Polyps can be removed when a doctor examines the inside of the large intestine during a colonoscopy.
The exact causes are unknown, but colon cancer has several potential risk factors. Polyps. Colon cancer usually derives from precancerous polyps that exist in the large intestine. The most common types of polyps are: Adenomas: These can resemble the normal lining of the colon but look different under a microscope. They can become cancerous.