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A sentinel lymph node biopsy (SLNB) identifies, removes, and examines a sentinel lymph node for the presence of cancer cells. Patients diagnosed with cancer undergo this surgical procedure.
A positive SLNB test indicates the spread of cancer from the sentinel to other regional lymph nodes and possibly other organs. With this information, a doctor can determine the cancer's stage (how far the disease has spread through the body) and develop a treatment plan.
A negative SLNB test result indicates the absence of cancer metastasis to neighboring lymph nodes or other organs.
Alternate Name of Sentinel Lymph Node Biopsy
Lymph node biopsy
Body Location
Depending on the type of cancer, a sentinel node biopsy may be needed to see if cancer cells have spread to the lymphatic system.
Sentinel Lymph Node Biopsy Procedure Type
Surgery
Preparation for Sentinel Lymph Node Biopsy
The location of the sentinel nodes is the initial step in doing a sentinel node biopsy. The following are some of the alternatives:
- A mild radioactive solution is injected near the tumor during this treatment. This solution is absorbed by your lymphatic system and transported to the sentinel nodes.
- This injection is usually given several hours, if not a day, before the surgical surgery to remove the sentinel nodes.
- Methylene blue / ICG dye that can be used to create a variety of colors. Your doctor may inject a non-toxic blue dye into the area surrounding the tumor. The dye is sent to the sentinel nodes through the lymphatic system, turning them a vibrant blue color.
- At the injection site, you may notice a change in your skin color. This color usually fades with time, although it could be permanent. You may also notice that your urine turns blue for a short period of time.
- The blue dye is usually delivered shortly before the surgical procedure to remove the sentinel nodes.
- Your surgeon will choose whether you receive the radioactive solution, blue dye, or both to find the sentinel nodes. During the same operation, some surgeons combine the two treatments.
Sentinel Lymph Node Biopsy Procedure
During the procedure, you'll most likely be put under general anesthesia. To avoid anesthesia complications, your doctor may advise you to fast for a particular period of time before the procedure.
The tracer/Dye is injected prior to the procedure.
The surgeon starts by creating a tiny incision in the lymph node area. The surgeon uses a small piece of equipment called a gamma detector to evaluate where the radioactivity has gathered and locate the sentinel nodes if you've been given a radioactive solution before the procedure. The blue dye dyes the sentinel nodes bright blue, making them visible to the surgeon. The surgeon next removes the sentinel nodes. One to five sentinel nodes are usually present, and they are all removed. Using a microscope, a pathologist examines the sentinel nodes for cancer cells.
Follow Up After Sentinel Lymph Node Biopsy
Your first follow-up appointment will be arranged based on the type of surgery you had and how well you recovered. Depending on where you reside and what the medical team recommends, you may see the surgeon or your primary care physician. Your doctor will evaluate your wound and remove any stitches, staples, glue, or drains that are still in place.
Risks Associated with Sentinel Lymph Node Biopsy
In general, sentinel node biopsy is a generally safe procedure. However, like with any surgery, there is the risk of complications, which include the following:
- Bleeding
- Bruising or soreness at the location of the biopsy
- Infection
- Allergic reaction to the dye used in the technique
- Lymphedema: A condition in which the lymph veins in a particular part of the body don't work properly, causing fluid to build up and swelling.
Recovery After Sentinel Lymph Node Biopsy
You'll then be sent to a recovery room, where your medical team will monitor you for any complications from the therapy or anesthesia. You will be able to go home on the same day if no additional surgery is required. Depending on your circumstances, you will be able to resume your typical activities sooner or later. The intricacy of the operation will determine the length of your hospital stay if a sentinel node biopsy is performed as part of the treatment to remove the cancer.
Frequently Asked Questions
1. What is sentinel lymph node biopsy and how is it performed?
Sentinel lymph node biopsy is a surgical procedure used to determine if cancer has spread to the lymph nodes. It involves identifying and removing the first few lymph nodes that cancer cells are likely to reach from the primary tumor.
2. What happens if sentinel node biopsy is positive?
If a sentinel lymph node biopsy is positive, it means that cancer cells have been detected in the removed lymph nodes. This finding suggests that the cancer has spread beyond the primary tumor and may require further treatment, such as additional lymph node removal or systemic therapy.
3. What is used in the sentinel lymph node biopsy?
In a sentinel lymph node biopsy, a radioactive tracer and/or a blue dye is typically used. The radioactive tracer is injected near the tumor, and it travels to the sentinel lymph nodes. The blue dye is also injected to help visually identify the lymph nodes during surgery.
4. Where is the sentinel node located?
The sentinel node is typically located near the primary tumor site. In the context of medical procedures, such as cancer staging and diagnosis, the sentinel node refers to the first lymph node(s) that receive drainage from the tumor. It is considered the first line of defense against the spread of cancer cells to other parts of the body.
5. Are sentinel lymph nodes cancerous?
The presence of cancer cells in sentinel lymph nodes can vary from case to case. It is possible for the sentinel lymph nodes to contain cancer cells if the cancer has spread. However, not all sentinel lymph nodes are cancerous, and their status is determined through biopsy and examination.
6. When is sentinel lymph node biopsy recommended?
Sentinel lymph node biopsy is typically recommended when there is a suspicion that cancer may have spread to the lymph nodes. It is commonly performed in cases of breast cancer, melanoma, and other solid tumors to assess the spread of cancer cells.
7. How many nodes are removed in sentinel node biopsy?
In a sentinel lymph node biopsy, typically one to three lymph nodes are removed for examination. These are the sentinel nodes, which are the first few nodes that cancer cells are likely to reach from the primary tumor.
8. Do plastic surgeons do sentinel lymph node biopsy?
Sentinel lymph node biopsy is primarily performed by surgical oncologists and general surgeons, plastic surgeons with appropriate training and expertise may also perform this procedure.
9. How much does a lymph node biopsy cost in Delhi?
The cost of a lymph node biopsy in Delhi can vary depending on various factors such as the healthcare provider, facility, specific procedure, and individual insurance coverage. It is best to consult with healthcare providers or hospitals in Delhi.