CSF rhinorrhoea occurs most commonly due to fracture of:
(b) Cribriform plate(Ref. Cummings, 6th ed., 805)The most common site of traumatic CSF rhinorrhoea is fracture of lateral lamella of cribriform plate. The other mentioned site's fractures can also cause CSF rhinorrhoea/otorhinorrhoea.
Tegmen tympani
Cribriform plate
Frontal sinus
Sphenoid sinus
Nose and PNS