Endoscopic endonasal access to the lateral recess of the sphenoid sinus

Background The standard endoscopic endonasal approach gives access to the median sphenoid sinus, but not to its lateral part. We propose an endoscopic technique for lesions in the lateral sphenoid sinus. Method Based on our experience with 28 patients, we have developed a less invasive approach to the lateral recess of the sphenoid sinus, limiting the opening of the maxillary sinus while avoiding resection of the inferior turbinate and ethmoidal cells. The technique is described. Conclusion The proposed endoscopic approach is reliable and safe to treat CSF leak or tumours located within the lateral recess of the sphenoid sinus.