Postoperative vaginal radiation in endometrial cancer using a remote afterloading technique

Area of Science:

• Gynecology
• Radiation Oncology
• Oncology

Background:

• Endometrial cancer is the most common gynecologic malignancy.
• Surgery is primary for early stages; radiation therapy is adjuvant.
• Prophylactic vaginal radiation reduces vaginal recurrences.

Purpose of the Study:

• To evaluate the efficacy and safety of remote afterloading technique (RAT) for vaginal vault radiation in early-stage endometrial cancer.
• To assess the impact of adjuvant vaginal radiation on recurrence rates and complications.

Main Methods:

• 330 patients with FIGO Stages I and II endometrial cancer treated between 1969-1976.
• External radiation (40 Gy) for high-risk Stage I and all Stage II patients, combined with surgery and intravaginal radiation.
• Remote afterloading technique (RAT) delivered 21 Gy in three fractions over four weeks, equivalent to 40 Gy at the mucosal surface.

Main Results:

• Overall pelvic and/or vaginal recurrence rate was 2.7%.
• Incidence of vaginal complications was 3.7%.
• RAT is cost-effective, with minimal early or late complications and no radiation exposure to staff.

Conclusions:

• Remote afterloading technique (RAT) is a safe and effective method for adjuvant vaginal radiation in endometrial cancer.
• This approach significantly reduces vaginal recurrences with a low complication rate.
• RAT offers a cost-effective and safe alternative for vaginal vault radiation.