Implementation of sentinel node biopsy in high-risk endometrial cancer.

Purpose of review: Endometrial cancer is the most common gynecologic malignancy and sentinel lymphnode biopsy is accepted as a valid alternative to lymphadenectomy for staging purposes. Recently, sentinel node biopsy has been also extended to high-risk disease where risk of nodal involvement is higher.

Recent findings: Our review focuses on the definition of high-risk disease and how there are different concepts of high-risk in the scientific community. While the sensitivity of sentinel node biopsy has been established and accepted in lower risk endometrial cancers, only in recent years retrospective and prospective evidence has been published. Ultrastaging allows to identify more nodal disease that would normally be overlooked by traditional staging, allowing proper adjuvant therapy to be administered. The longstanding question of whether lymphadenectomy in high-risk settings is a therapeutic or a staging procedure remains open. Retrospective data, however, show that oncologic outcomes are not compromised by sentinel node biopsy.

Summary: Sentinel node biopsy is a valid alternative to traditional, more extensive nodal staging: with the addition of ultrastaging, it has more sensitivity than lymphadenectomy with less surgical morbidity. Ongoing trials will definitively establish if oncological outcomes are affected by sentinel node biopsy, but retrospective data are encouraging.