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      Ex vivo Retrieval of Mature Oocytes for Fertility Preservation in a Patient with Bilateral Borderline Ovarian Tumor Translated title: Recuperação ex vivo de oócitos maduros para preservação da fertilidade em paciente com tumor ovariano borderline bilateral

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          Abstract

          We report a case of ultrasound-guided ex vivo oocyte retrieval for fertility preservation in a woman with bilateral borderline ovarian tumor, for whom conventional transvaginal oocyte retrieval was deemed unsafe because of the increased risk of malignant cell spillage. Ovarian stimulation with gonadotropins was performed. Surgery was scheduled according to the ovarian response to exogenous gonadotropic stimulation; oophorectomized specimens were obtained by laparoscopy, and oocyte retrieval was performed ∼ 37 hours after the ovulatory trigger. The sum of 20 ovarian follicles were aspirated, and 16 oocytes were obtained. We performed vitrification of 12 metaphase II oocytes and 3 oocytes matured in vitro. Our result emphasizes the viability of ex vivo mature oocyte retrieval after controlled ovarian stimulation for those with high risk of malignant dissemination by conventional approach.

          Resumo

          Relatamos um caso de obtenção ex vivo de óvulos, guiada por ultrassonografia, para preservação da fertilidade em uma mulher com tumor ovariano borderline bilateral, para quem a recuperação transvaginal convencional foi considerada insegura, devido ao aumento do risco de disseminação de células malignas. Foi realizada estimulação ovariana com gonadotrofinas. A cirurgia foi agendada de acordo com a resposta ovariana à estimulação gonadotrófica exógena; após ooforectomia por laparoscopia, ∼ 37 horas após a maturação folicular, procedeu-se à recuperação extracorpórea de oócitos. Um total de 20 folículos ovarianos foi aspirado e 16 complexos cumulus foram obtidos, resultando na vitrificação de 12 oócitos maduros e de 3 oócitos imaturos amadurecidos in vitro. Nosso resultado enfatiza a viabilidade da recuperação ex vivo de oócitos maduros após estimulação ovariana controlada para mulheres com alto risco de disseminação maligna pela captação oocitária realizada convencionalmente pela via transvaginal.

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          Most cited references36

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          Highly efficient vitrification for cryopreservation of human oocytes and embryos: the Cryotop method.

          Vitrification is frequently referred to as a novel technology of cryopreservation in embryology, although some young embryologists were born after its first successful application. Unfortunately, in spite of the accumulated evidence regarding its enormous potential value, most domestic animal and human laboratories use exclusively the traditional slow-rate freezing with its compromised efficiency and inconsistency. The purpose of this paper is to clarify terms and conditions, to summarize arguments supporting or disapproving the use of vitrification, and to outline its role among assisted reproductive technologies. To provide evidence for the potential significance of vitrification, achievements with the Cryotop technology, an advanced version of the "minimal volume approaches" is analyzed. This technology alone has resulted in more healthy babies after cryopreservation of blastocysts than any other vitrification technique, and more successful human oocyte vitrification resulting in normal births than any other cryopreservation method. The value of this method is also demonstrated by achievements in the field of domestic animal embryology. A modification of the technique using a hermetically sealed container for storage may help to eliminate potential dangers of disease transmission and open the way for widespread application for cryopreservation at all phases of oocyte and preimplantation embryo development in mammals.
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            Terms, definitions and measurements to describe the sonographic features of adnexal tumors: a consensus opinion from the International Ovarian Tumor Analysis (IOTA) Group.

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              Fertility preservation in patients undergoing gonadotoxic therapy or gonadectomy: a committee opinion.

              (2019)
              Patients preparing to undergo gonadotoxic medical therapy, radiation therapy, or gonadectomy should be provided with prompt counseling regarding available options for fertility preservation for iatrogenic infertility. Fertility preservation can best be provided by comprehensive programs designed and equipped to confront the unique challenges facing these patients. This document replaces the document with a similar name, last published in 2013.
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                Author and article information

                Journal
                Rev Bras Ginecol Obstet
                Rev Bras Ginecol Obstet
                10.1055/s-00030576
                RBGO Gynecology & Obstetrics
                Thieme Revinter Publicações Ltda. (Rua do Matoso 170, Rio de Janeiro, RJ, CEP 20270-135, Brazil )
                0100-7203
                1806-9339
                19 January 2021
                March 2021
                1 January 2021
                : 43
                : 3
                : 225-231
                Affiliations
                [1 ]Hospital Sírio-Libanês, Brasília, DF, Brazil
                [2 ]Genesis, Centro de Assistência em Reprodução Humana, Brasília, DF, Brazil
                [3 ]Diagnose, Laboratório de Anatomia Patológica e Citologia, Brasília, DF, Brazil
                Author notes
                Address for correspondence Bruno Ramalho de Carvalho SGAS 614, Conjunto C, Sala 177, Edifício VITRIUM - Centro Médico Inteligente, Asa Sul, Brasília, Distrito Federal, 70200-740Brazil ramalho.b@ 123456gmail.com
                Author information
                http://orcid.org/0000-0002-1554-9499
                http://orcid.org/0000-0002-6463-7268
                http://orcid.org/0000-0003-4499-6965
                http://orcid.org/0000-0001-8166-5095
                http://orcid.org/0000-0001-8186-4051
                http://orcid.org/0000-0001-7796-1780
                http://orcid.org/0000-0001-6347-0980
                Article
                200198
                10.1055/s-0040-1718436
                10183897
                33465787
                e4b28745-da99-4a84-ad1e-73b900f93d45
                Federação Brasileira de Ginecologia e Obstetrícia. This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. ( https://creativecommons.org/licenses/by/4.0/ )

                This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 10 June 2020
                : 03 August 2020
                Categories
                Case Report

                cryopreservation,ex vivo oocyte retrieval,fertility preservation,ovarian cancer,borderline ovarian tumor,vitrification,criopreservação,recuperação extracorpórea de oócitos,preservação de fertilidade,câncer do ovário,tumor borderline de ovário,vitrificação

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