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Clinical Trial
. 2012 Nov 1;30(31):3786-91.
doi: 10.1200/JCO.2011.41.2528. Epub 2012 Jul 2.

Lymphatic mapping and sentinel lymph node biopsy in women with squamous cell carcinoma of the vulva: a gynecologic oncology group study

Charles F Levenback  1 , Shamshad Ali, Robert L Coleman, Michael A Gold, Jeffrey M Fowler, Patricia L Judson, Maria C Bell, Koen De Geest, Nick M Spirtos, Ronald K Potkul, Mario M Leitao Jr, Jamie N Bakkum-Gamez, Emma C Rossi, Samuel S Lentz, James J Burke 2nd, Linda Van Le, Cornelia L Trimble
Affiliations
Clinical Trial

Lymphatic mapping and sentinel lymph node biopsy in women with squamous cell carcinoma of the vulva: a gynecologic oncology group study

Charles F Levenback et al. J Clin Oncol. .

Abstract

Purpose: To determine the safety of sentinel lymph node biopsy as a replacement for inguinal femoral lymphadenectomy in selected women with vulvar cancer.

Patients and methods: Eligible women had squamous cell carcinoma, at least 1-mm invasion, and tumor size ≥ 2 cm and ≤ 6 cm. The primary tumor was limited to the vulva, and there were no groin lymph nodes that were clinically suggestive of cancer. All women underwent intraoperative lymphatic mapping, sentinel lymph node biopsy, and inguinal femoral lymphadenectomy. Histologic ultra staging of the sentinel lymph node was prescribed.

Results: In all, 452 women underwent the planned procedures, and 418 had at least one sentinel lymph node identified. There were 132 node-positive women, including 11 (8.3%) with false-negative nodes. Twenty-three percent of the true-positive patients were detected by immunohistochemical analysis of the sentinel lymph node. The sensitivity was 91.7% (90% lower confidence bound, 86.7%) and the false-negative predictive value (1-negative predictive value) was 3.7% (90% upper confidence bound, 6.1%). In women with tumor less than 4 cm, the false-negative predictive value was 2.0% (90% upper confidence bound, 4.5%).

Conclusion: Sentinel lymph node biopsy is a reasonable alternative to inguinal femoral lymphadenectomy in selected women with squamous cell carcinoma of the vulva.

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Conflict of interest statement

Authors' disclosures of potential conflicts of interest and author contributions are found at the end of this article.

Figures

Fig 1.
Fig 1.
CONSORT diagram. GOG, Gynecologic Oncology Group; LN, lymph node; SLN, sentinel lymph node.
Fig 2.
Fig 2.
Projected versus actual accrual and incidence of lymph node metastasis. LN, lymph node; LSG, lymphoscintigraphy.
Fig A1.
Fig A1.
Stopping rules associated with the three-phase sampling scheme. TP, true positive.
See this image and copyright information in PMC

Comment in

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