Sentinel Node Mapping for Colorectal Cancer

In the treatment of colon and rectal cancer, staging (determining the progress of the cancer) is vital in determining the course of treatment. When any form of cancer spreads to other parts of the body, the cancer cells must first pass through the lymph nodes.Until recently, it was difficult to determine which nodes should be examined for cancer. Sentinel node mapping gives doctors an important tool in tracking the metastasis (spread) of colorectal cancer.

During the surgery to remove the tumor, a bright blue dye is injected into the tumor. This dye allows the surgeon to identify the lymph nodes nearest the tumor. The pathologist can perform an intense examination of the lymph nodes. This procedure is extremely effective – studies have found that 15% of patients with were found to have metastatic cancer that was not detectable with older methods . Detecting metastatic cancer as soon as possible means that preventative measures can be taken while the cancer is still small.

Sentinel node mapping is performed by the Department of Surgical Oncology. More information about this procedure is available at their website.