![]() ![]() They send the lymph nodes to the laboratory to check for cancer cells. Your surgeon usually removes between 1 to 3 nodes. The dye and the tracer help the surgeon identify the sentinel node. During the operation, your surgeon also injects a small amount of blue dye around the cancer. Your surgeon removes the sentinel lymph nodes during your operation to remove the mouth cancer. Or you may go home and return the following day for your surgery. Afterwards you might go straight to the ward to prepare for surgery. The scan can take around 90 minutes, but this time may vary. The radiographer might mark where these nodes are on your skin. The first nodes that the tracer drains into are the sentinel nodes. This picks up the radioactive liquid and traces it as it moves through the lymphatic vessels and into the lymph nodes. The radioactive liquid is called a tracer. You have an injection of a small amount of mildly radioactive liquid into the area close to the cancer. This scan shows the surgeon which lymph nodes to remove but doesn’t tell them whether the nodes contain cancer. You usually have this in the nuclear medicine department in the hospital. The day before or morning of your operation you have a scan to show where the sentinel nodes are. How you have a sentinel lymph node biopsy Before your sentinel lymph node biopsy You might have a sentinel node biopsy at the same time as your operation to remove the cancer. This is usually for people with early stage mouth cancer. The doctor then checks to see if this lymph nodes contains cancer cells. ![]()
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