What is a sentinel lymph node biopsy in endometrial cancer?

Question

Hello doctor,

My daughter is 39 years old and was recently told she has endometrial cancer and needs to have surgery soon. The surgeon mentioned something called a sentinel lymph node biopsy during the pre-operative counseling, but spoke very fast, and we did not fully understand what it means or why it is done.

She had an MRI scan last week, which showed a small lesion confined to the endometrium with no obvious myometrial invasion, so the surgeon thinks it is likely an early stage.

My daughter is already very anxious and is seeing a psychiatrist who has her on a low dose of Clonazepam for the anxiety. We are trying to gather as much information as possible before the surgery, which is scheduled in two weeks.

I read that in endometrial cancer surgery, some hospitals do a full lymph node dissection, while others do the sentinel node technique instead, but I could not understand the difference or which is better for her case.

What exactly is a sentinel lymph node biopsy in the context of endometrial cancer surgery?
How is it done?
What does it tell the doctors?
Is it as accurate as removing all the lymph nodes?
Are there any specific risks or limitations of this procedure we should be aware of before giving consent for surgery?

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

I hope you are doing well, and I wish your daughter good health and a full recovery.

I completely understand how worried and anxious you must feel about her diagnosis, but let me explain things as simply as possible.

In endometrial cancer, treatment decisions are not based primarily on sentinel lymph node assessment. More commonly, we rely on the endometrial biopsy and magnetic resonance imaging (MRI) findings. The biopsy identifies the type and grade of the tumor, while the MRI helps determine the extent of the disease and whether it has spread beyond the uterus. Surgical planning is based largely on this information.

If the tumor is confined to the endometrium and has not invaded the uterine muscle, a less extensive surgery may be sufficient. If there is deeper invasion or spread beyond the endometrium, a more extensive hysterectomy may be recommended.

For younger women, especially those around 39 years old, preserving the ovaries is often considered when it is oncologically safe because they continue to produce hormones that are important for overall health and quality of life.

Regarding the sentinel lymph node, whether it is performed or not is usually not the most critical factor in managing endometrial cancer. If postoperative findings suggest a risk of residual disease or spread beyond the uterus, additional treatments such as radiation therapy can be used to reduce the risk of recurrence. Therefore, the absence of sentinel lymph node mapping alone does not necessarily compromise treatment outcomes.

It is important to trust the treating surgical team to choose the most appropriate procedure based on the imaging, pathology, and overall clinical picture.

It is also completely understandable for your daughter to feel stressed or overwhelmed during this process. Psychological support, counseling, or connecting with support groups of women who have gone through similar experiences can be very helpful.

I hope this explanation makes things clearer, and I wish your daughter a successful treatment and a smooth recovery.

I hope you are satisfied with my answer. For further queries, you can consult me at iCliniq.

Thank you.