Sentinel lymph node detection in patients with endometrial cancer

Area of Science:

• Gynecologic Oncology
• Surgical Oncology
• Nuclear Medicine

Background:

• Endometrial cancer staging often involves pelvic and paraaortic lymphadenectomy.
• Sentinel lymph node (SLN) mapping offers a potentially less invasive staging method.
• Accurate SLN identification is crucial for precise staging and treatment planning.

Purpose of the Study:

• To evaluate the feasibility of SLN detection in endometrial cancer patients.
• To assess the utility of preoperative lymphoscintigraphy and intraoperative gamma probe for SLN identification.
• To determine the accuracy of SLN detection for identifying lymph node metastases.

Main Methods:

• 28 endometrial cancer patients underwent SLN detection using preoperative lymphoscintigraphy with 99m-Technetium-labeled phytate and an intraoperative gamma probe.
• SLN detection was performed prior to standard lymphadenectomy.
• Hysteroscopic injection of the radiotracer into the endometrium was utilized.

Main Results:

• SLN detection was successful in 82% of patients (23/28), with a mean of 3.1 SLNs identified.
• Detection rates were higher (95%) in patients with tumors invading less than halfway into the myometrium.
• The sensitivity and specificity for detecting lymph node metastases were both 100%.

Conclusions:

• Preoperative lymphoscintigraphy combined with intraoperative gamma probe detection is a feasible method for identifying SLNs in early-stage endometrial cancer.
• This technique accurately identifies lymph node metastases.
• SLN mapping may refine staging and guide surgical management in endometrial cancer.