The most common site of leak in CSF rhinorrhoea is:
CSF rhinorrhoea is most commonly iatrogenic, following endoscopic sinus surgery. It can occur in surgery of frontal, sphenoid or ethmoid sinus. Injury to cribriform plate and ethmoid roof is the most common cause.
Sphenoid sinus
Frontal sinus
Cribriform plate
Tegmen tympani
Nose and PNS