Fig. 3

Repositioning of the pericranial flap (PC) via the endonasal endoscopic approach. a A flap inserted through the supraorbital burr hole is partially visible on the margin of a pre-made cribriform defect (endonasal view). b Flap repositioning was done via endonasal endoscopic approach. As a result, the cribriform plate defect was fully covered (endonasal view). c Endoscope view via a supraorbital burr hole. Pedicled pericranial flap inserted to cover the cribriform plate defect (arrow)