<prompt> Which of the following is the most common site of traumatic CSF RhinorrheaEthmoid sinusFrontal sinusPariental fossaSphenoid sinus  <response>: CSF from anterior cranial fossa reaches the nose i cribriform plate, ii roof of ethmoid air cells or iii frontal sinus. CSF from middle cranial fossa follows injuries to sphenoid sinus. In fractures of temporal bone, CSF reaches the middle ear and then escapes through the eustachian tube into the nose CSF otorhinorrhoeaAnterior skull base leaks are more common than middle or posterior leaks, due to the firm adherence of the dura to the anterior basilar skull. The most common sites of CSF rhinorrhea following accidental trauma are the sphenoid sinus 30, frontal sinus 30, and ethmoidcribriform 23 Please note how close the percentages are, so can vary author to authorDhingra 6e pg: 163 