Oonk MHM, Slomovitz B, Baldwin PJW, van Doorn HC, van der Velden J, de Hullu JA, Gaarenstroom KN, Slangen BFM, Vergote I, Brännström M, van Dorst EBL, van Driel WJ, Hermans RH, Nunns D, Widschwendter M, Nugent D, Holland CM, Sharma A, DiSilvestro PA, Mannel R, Boll D, Cibula D, Covens A, Provencher D, Runnebaum IB, Luesley D, Ellis P, Duncan TJ, Tjiong MY, Cruickshank DJ, Kjølhede P, Levenback CF, Bouda J, Kieser KE, Palle C, Spirtos NM, O'Malley DM, Leitao MM, Geller MA, Dhar K, Asher V, Tamussino K, Tobias DH, Borgfeldt C, Lea JS, Bailey J, Lood M, Eyjolfsdottir B, Attard-Montalto S, Tewari KS, Manchanda R, Jensen PT, Persson P, Van Le L, Putter H, de Bock GH, Monk BJ, Creutzberg CL, and van der Zee AGJ
Purpose: The Groningen International Study on Sentinel nodes in Vulvar cancer (GROINSS-V)-II investigated whether inguinofemoral radiotherapy is a safe alternative to inguinofemoral lymphadenectomy (IFL) in vulvar cancer patients with a metastatic sentinel node (SN)., Methods: GROINSS-V-II was a prospective multicenter phase-II single-arm treatment trial, including patients with early-stage vulvar cancer (diameter < 4 cm) without signs of lymph node involvement at imaging, who had primary surgical treatment (local excision with SN biopsy). Where the SN was involved (metastasis of any size), inguinofemoral radiotherapy was given (50 Gy). The primary end point was isolated groin recurrence rate at 24 months. Stopping rules were defined for the occurrence of groin recurrences., Results: From December 2005 until October 2016, 1,535 eligible patients were registered. The SN showed metastasis in 322 (21.0%) patients. In June 2010, with 91 SN-positive patients included, the stopping rule was activated because the isolated groin recurrence rate in this group went above our predefined threshold. Among 10 patients with an isolated groin recurrence, nine had SN metastases > 2 mm and/or extracapsular spread. The protocol was amended so that those with SN macrometastases (> 2 mm) underwent standard of care (IFL), whereas patients with SN micrometastases (≤ 2 mm) continued to receive inguinofemoral radiotherapy. Among 160 patients with SN micrometastases, 126 received inguinofemoral radiotherapy, with an ipsilateral isolated groin recurrence rate at 2 years of 1.6%. Among 162 patients with SN macrometastases, the isolated groin recurrence rate at 2 years was 22% in those who underwent radiotherapy, and 6.9% in those who underwent IFL ( P = .011). Treatment-related morbidity after radiotherapy was less frequent compared with IFL., Conclusion: Inguinofemoral radiotherapy is a safe alternative for IFL in patients with SN micrometastases, with minimal morbidity. For patients with SN macrometastasis, radiotherapy with a total dose of 50 Gy resulted in more isolated groin recurrences compared with IFL., Competing Interests: Brian SlomovitzConsulting or Advisory Role: Clovis Oncology, AstraZeneca, Genentech, Incyte, Agenus, GlaxoSmithKline, GOG Foundation, Myriad Genetics, Merck, Eisai Ignace VergoteConsulting or Advisory Role: Amgen, AstraZeneca, Clovis Oncology, Carrick Therapeutics, Deciphera, Elevar Therapeutics, Genmab, GlaxoSmithKline, Immunogen, Jazz Pharmaceuticals, Mersana, MSD, Novocure, OCTIMET Oncology NV, Oncoinvent, Sotio, Verastem, Zentalis, Roche, MillenniumResearch Funding: Roche, Genmab, Amgen, OncoinventTravel, Accommodations, Expenses: Roche, AstraZeneca, Tesaro, Amgen, MSD/Merck Mats BrännströmStock and Other Ownership Interests: EUGIN Sweden Martin WidschwendterStock and Other Ownership Interests: Sola Diagnostics, BreOva HealthPatents, Royalties, Other Intellectual Property: Patents relevant for risk prediction or diagnosis of women's cancers Paul A. DiSilvestroConsulting or Advisory Role: AstraZeneca, AgenusResearch Funding: Janssen Oncology, Tesaro, AstraZeneca, Genentech, AbbVie Robert MannelConsulting or Advisory Role: Tesaro Dorry BollResearch Funding: AstraZeneca David CibulaConsulting or Advisory Role: AstraZeneca, Sotio, Roche, GlaxoSmithKline Diane ProvencherConsulting or Advisory Role: AstraZeneca, GlaxoSmithKlineResearch Funding: AstraZeneca, AbbVie Ingo B. RunnebaumConsulting or Advisory Role: AbbVie (I), Amgen, AstraZeneca, Clovis Oncology, GlaxoSmithKline, Oncgnostics, Tesaro Preben KjølhedeResearch Funding: Leo Pharma AB Katharina E. KieserHonoraria: AstraZenecaConsulting or Advisory Role: MerckResearch Funding: AstraZeneca Nicola M. SpirtosResearch Funding: AbbVie, AstraZeneca, Genentech/Roche, Clovis Oncology, Seattle GeneticsPatents, Royalties, Other Intellectual Property: Application No. PCT/US 2019/19465 Cannabis Based Therapeutic and Method of Use Application No, US Patent 0024098766 Compounds Cannabidiol and Flavanones 63/047550 (July 1, 2020) 63/055458 (July 23, 2020) David M. O'MalleyConsulting or Advisory Role: Janssen Oncology, AstraZeneca, Clovis Oncology, Tesaro, Novocure, AbbVie, Genentech/Roche, OncoQuest, Immunogen, GOG Foundation, Translational Genomics Research Institute, Agenus, Marker Therapeutics, Eisai, Genelux, Iovance Biotherapeutics, Ambry Genetics, Tarveda Therapeutics, Leap Therapeutics, Myriad Genetics, GlaxoSmithKline, Regeneron, Sorrento Therapeutics, Rubius Therapeutics, Elevar Therapeutics, Novartis, Seagen, BBI Healthcare, Arquer Diagnostics, Toray Medical, Takeda, InxMed, Celsion, Roche Diagnostics MSAResearch Funding: Amgen, AstraZeneca, Genentech/Roche, Regeneron, Immunogen, Janssen Research & Development, Clovis Oncology, EMD Serono, Ergomed, Ajinomoto, Cerulean Pharma, PharmaMar, Array BioPharma, Bristol Myers Squibb, Agenus, Tesaro, TRACON Pharma, Genmab, Seattle Genetics, Iovance Biotherapeutics, Leap Therapeutics, Merck, AbbVie/Stemcentrx, AbbVie, Mersana, Eisai, BBI Healthcare, Sumitomo Dainippon Pharma Oncology Mario M. LeitaoHonoraria: Intuitive SurgicalConsulting or Advisory Role: Intuitive Surgical, Ethicon/Johnson & Johnson, Medtronic, TakedaResearch Funding: KCITravel, Accommodations, Expenses: Intuitive Surgical Melissa A. GellerResearch Funding: Tesaro, Genentech, FATE Therapeutics, Morphotek, Bayer Karl TamussinoOther Relationship: Medtronic Daniel H. TobiasConsulting or Advisory Role: Ethicon Jayanthi S. LeaConsulting or Advisory Role: Roche Brynhildur EyjolfsdottirOther Relationship: Intuitive Surgical Krishnansu S. TewariHonoraria: Tesaro, Clovis OncologyConsulting or Advisory Role: Roche/Genentech, Tesaro, Clovis Oncology, AstraZenecaSpeakers' Bureau: Roche/Genentech, AstraZeneca, Merck, Tesaro, Clovis OncologyResearch Funding: AbbVie, Genentech/Roche, Morphotek, Merck, RegeneronTravel, Accommodations, Expenses: Roche/Genentech Ranjit ManchandaHonoraria: AstraZeneca Linda Van LeConsulting or Advisory Role: EyePoint Pharmaceuticals, Novartis, Advarum, Neurotech, Iveric, Gemini Therapeutics, NaegisResearch Funding: GOG Partners Trial Bradley J. MonkLeadership: US OncologyHonoraria: AbbVie, Advaxis, Agenus, Akeso Biopharma, Amgen, Aravive, AstraZeneca, Asymmetric Therapeutics, Boston Biomedical, ChemoID, Clovis Oncology, Deciphera Pharmaceuticals, Eisai, Geistlich Pharma, Genmab/Seattle Genetics, ImmunoGen, Immunomedics, Incyte, Iovance Biotherapeutics, Laekna Health Care, Merck, Mersana, Myriad Pharmaceuticals, Nucana, Oncomed, Oncoquest, Oncosec, Perthera, Pfizer, Puma Biotechnology, Regeneron, Roche/Genentech, Senti Biosciences, Takeda, Tarveda Therapeutics, Tesaro/GSK, Vavotar Life Sciences, Vascular Biogenics, Vigeo Therapeutics, GOG Foundation, Starton Therapeutics, Elevar Therapeutics, Novocure, Gradalis, Karyopharm TherapeuticsConsulting or Advisory Role: AbbVie, Advaxis, Agenus, Akeso Biopharma, Amgen, Aravive, AstraZeneca, Asymmetric Therapeutics, Boston Biomedical, ChemoCare, ChemoID, Clovis Oncology, Deciphera Pharmaceuticals, Eisai, Geistlich Pharma, Genmab/Seattle Genetics, GOG Foundation, ImmunoGen, Immunomedics, Incyte, Iovance Biotherapeutics, Laekna Health Care, Merck, Mersana, Myriad Pharmaceuticals, Nucana, Oncomed, Oncoquest, Oncosec, Perthera, Pfizer, Puma Biotechnology, Regeneron, Roche/Genentech, Senti Biosciences, Takeda, Tarveda Therapeutics, Tesaro/GSK, Vavotar Life Sciences, Vascular Biogenics, Vigeo Therapeutics, Gradalis, Karyopharm Therapeutics, Sorrento Therapeutics, NovocureSpeakers' Bureau: Roche/Genentech, AstraZeneca, Clovis Oncology, Eisai, Tesaro/GSK, MerckResearch Funding: Novartis, Amgen, Genentech, Lilly, Janssen, Array BioPharma, Tesaro, Morphotek, Pfizer, Advaxis, AstraZeneca, Immunogen, Regeneron, Nucana Carien L. CreutzbergConsulting or Advisory Role: MerckResearch Funding: Elekta, Varian Medical SystemsNo other potential conflicts of interest were reported.