Abstract
Purpose
Fertility preservation (FP) for children is still challenging due to an information gap. In particular, there is little information about the surgical aspects of ovarian tissue cryopreservation (OTC) for children. In the present study, the appropriateness of preoperative management and the criteria of our cases were investigated with the aim of establishing a safe OTC procedure.
Methods
A total of 25 girls who underwent OTC from November 2015 through May 2020 were retrospectively analyzed with IRB approval.
Results
The median age of the patients was 13 (1–17) years. The medical indications were varied (e.g., leukemia, lymphoma, brain tumor), and included rare diseases. Seventeen cases (68%) underwent OTC during chemotherapy or radiotherapy, and 21 (84%) had comorbidities. All cases underwent ovarian tissue retrieval (OTR) with laparoscopy, and the median operating time was 64 (36–97) min, with little bleeding. Although two had complications, all patients started treatment on schedule. The median WBC and CRP increases a day after OTR were 0 (− 4400 to + 5200)/µl and 0.21 (− 0.2 to 0.87) mg/dl, respectively, with no complications.
Conclusion
As long as the preoperative criteria are met, OTC could be possible even for children with a severe blood condition. In such cases, the degrees of the WBC and CRP elevations are useful to assess surgical infection.
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All authors contributed to the study conception and design. Material preparation and data or writing materials collection were performed by ES, YI, KO, HI, YN, KK, JO, KT, SS, YS, YS, YH, HN, HK, and ID. Data analysis was performed by ST, SF and DK. The first draft of the manuscript was written by ST, and all authors commented on the original versions of the manuscript. In particular, critical discussion of each specialist aspect was performed by ST, SF, MS, TM, HK, and NS. All authors read and approved the final manuscript.
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Research involving human participants and/or animals
The present clinical study was performed with the approval of the IRB of St. Marianna University School of Medicine, as “The verification of safety and efficacy of ovarian tissue and oocyte cryopreservation for child patients” (IRB approval number: No. 3424). The study was also registered with the UMIN Clinical Trials Registry (URL: https://www.umin.ac.jp/ctr).
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As mentioned in the manuscript, all legal guardians and patients (16 years and above) gave written, informed consent in keeping with the Declaration of Helsinki, and the study was approved by the institutional review board of the university. Patients under 16 years of age provided their informed consent after reproductive surgeons and pediatricians provided information through illustrations and animation.
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Takae, S., Furuta, S., Keino, D. et al. Surgical management of unilateral oophorectomy for ovarian tissue cryopreservation in high-risk children and adolescents with varied backgrounds. Pediatr Surg Int 37, 1021–1029 (2021). https://doi.org/10.1007/s00383-021-04900-7
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DOI: https://doi.org/10.1007/s00383-021-04900-7