Fig. 3From: Treatment with endoscopic transnasal resection of hypothalamic pilocytic astrocytomas: a single-center experienceThe intraoperative photographs show the harvesting of the “In Situ Bone Flap” and the evolution of the skull base defect postoperative healing. a The dimension of the designed ISBF ranged from one lateral cavernous sinus to the other, and from the planum sphenoidale to the sellar floor; b The elevation of the ISBF from the dura below it using a Cottle dissector; c The endoscopic view shows the intact dura, intercavernous sinus (IS) and optic canal (OC) after removing the In Situ Bone Flap. d–f The postoperative sagittal CT images shows the process of healing of the In Situ Bone Flap, at one day (d), 3 months (e) and 6 months (f), postoperativelyBack to article page