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