Fig. 2

 A nasal endoscopic view of the resection path for the space-occupying lesion of the right sella. (a) The size and shape of the tumor under direct visualization during endoscopy (white arrow). (b) The surgical field exposed after complete resection of the cyst wall and cyst contents. (c) In the anatomical region from which the exposed tumor was resected, the right internal carotid artery (orange arrow), the right trigeminal nerve (green arrow), and the cavernous sinus (yellow arrow) are visible