Endoscopic surgery of the paranasal sinuses and anterior skull base 2 nd edition. After anterior skull base surgery140 immediate repair 175 176 in pansinus operation 132 endoscopic sinus surgery ess 176 177 177 178 ethmoidectomy 207 frontal sinuses 19 infl ammatory 160 161 and informed consent 19 orbital 147 150 sinusitis 147 155 sphenoid 19 computed tomography ct 72 75 and computer aided surgery88 differential diagnosis and mri 77 dural fi stula 174 . Coverage of the most important concepts in endoscopic sinus surgery with new insights into the anatomy of the paranasal sinuses this text covers the basic concepts of intranasal surgery of the paranasal sinuses endoscopic anatomy preoperative and postoperative diagnosis instrumentation anesthesia and patient positioning it describes . This text covers the basic concepts of intranasal surgery of the paranasal sinuses endoscopic anatomy preoperative and postoperative diagnosis instrumentation anesthesia and patient positioning it describes standard and advanced surgical techniques for the nasal cavity the maxillary antrum the ethmoid frontal and sphenoid sinuses and the anterior base of the skull