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. 2021 Jan 12;21:15. doi: 10.1186/s12902-020-00677-3

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — a Immunohistochemical staining of the tumor shows a positive result of LH (original magnification × 100) (black arrow). b Immunohistochemical staining of the tumor shows a negative result of FSH (original magnification × 100) (black arrow). Usually a positive signal of FSH shows in the cytoplasm, but in our biopsy the signal shows in the nuclear, so it should also be considered as a negative result. c The concentration of serum LH peaks at 6 h after the operation and gradually falls to normal level. d The concentration of serum FSH peaks at 8 h after the operation and gradually falls to normal level