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(A) The tumor broke through the sphenoid sinus and grew to the nasal cavity. (B, C) An extended transnasal approach was performed. (D) Decompression inside the tumor. (E) Removal of the saddle septum attached to the base of the tumor. (F–H) Remove the adhesion tissue between the tumor and the cavernous sinus and internal carotid artery. (I) Pituitary stalk was preserved. (J–L) Tumor was gross total removed.
