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Comparative Study
Journal Article
Reducing overtreatment: A comparison of lymph node assessment strategies for endometrial cancer.
Gynecologic Oncology 2016 November
OBJECTIVES: To compare the utility of three lymph node (LN) assessment strategies to identify lymphatic metastases while minimizing complete lymphadenectomy rates in women with low-grade endometrial cancer (EC).
METHODS: Using our institutional standard protocol (SP), patients with complex atypical hyperplasia (CAH) or grade 1/2 EC underwent sentinel lymph node (SLN) mapping, hysterectomy, and intraoperative frozen section (FS). Lymphadenectomy was performed if high-risk uterine features were identified on FS. Utilizing SP data, two alternative strategies were applied: a Universal FS Strategy (UFS), omitting SLN mapping and performing lymphadenectomy based on FS results, and a SLN-Restrictive FS Strategy (SLN-RFS) in which FS and lymphadenectomy are performed only if bilateral SLN mapping fails.
RESULTS: Of 114 patients managed on the SP, SLNs were identified in 86%, with lymphatic metastases detected in eight patients. Six patients recurred after a median follow up of 15months. Most (83%) developed in those who had a negative systematic lymphadenectomy (n=4; mean LNs: 18) or no lymphadenectomy indication. When applying the alternative lymphatic assessment strategies, the SLN-RFS approach would theoretically result in lower lymphadenectomy rates compared to both the SP and the alternative UFS strategies (9.2% versus 36.8% and 36.8%, respectively; p=0.004), without a reduction in detection of LN metastases (8/8 versus 8/8 and 5/8, respectively).
CONCLUSION: In this modeling analysis, an operative strategy omitting universal frozen section and restricting its use to cases with failed SLN mapping may result in lower lymphadenectomy rates and reduce the risk of overtreatment without compromising oncologic outcome for patients with EC.
METHODS: Using our institutional standard protocol (SP), patients with complex atypical hyperplasia (CAH) or grade 1/2 EC underwent sentinel lymph node (SLN) mapping, hysterectomy, and intraoperative frozen section (FS). Lymphadenectomy was performed if high-risk uterine features were identified on FS. Utilizing SP data, two alternative strategies were applied: a Universal FS Strategy (UFS), omitting SLN mapping and performing lymphadenectomy based on FS results, and a SLN-Restrictive FS Strategy (SLN-RFS) in which FS and lymphadenectomy are performed only if bilateral SLN mapping fails.
RESULTS: Of 114 patients managed on the SP, SLNs were identified in 86%, with lymphatic metastases detected in eight patients. Six patients recurred after a median follow up of 15months. Most (83%) developed in those who had a negative systematic lymphadenectomy (n=4; mean LNs: 18) or no lymphadenectomy indication. When applying the alternative lymphatic assessment strategies, the SLN-RFS approach would theoretically result in lower lymphadenectomy rates compared to both the SP and the alternative UFS strategies (9.2% versus 36.8% and 36.8%, respectively; p=0.004), without a reduction in detection of LN metastases (8/8 versus 8/8 and 5/8, respectively).
CONCLUSION: In this modeling analysis, an operative strategy omitting universal frozen section and restricting its use to cases with failed SLN mapping may result in lower lymphadenectomy rates and reduce the risk of overtreatment without compromising oncologic outcome for patients with EC.
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