Protrusion of the optic nerve into the ethmoid and sphenoid sinus: prospective study of 150 CT studies

  title={Protrusion of the optic nerve into the ethmoid and sphenoid sinus: prospective study of 150 CT studies},
  author={Patrick Dessi and Guy Moulin and Francisco Hern{\'a}inz Berm{\'u}dez de Castro and Christophe Chagnaud and Maurice Cannoni},
Damage to the optic nerve is a serious complication of intranasal sinus surgery. Protrusion of the optic canal into the sphenoid sinus is a major risk factor. In this prospective study of 150 CT studies, we found this anatomical variation in 8% of cases. It was consistently associated with pneumatisation of the ipsilateral anterior clinoid process. Protrusion of the optic nerve into the posterior ethmoid cells was never observed. CT is a useful part of the preoperative investigation of patients… CONTINUE READING

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