This book contains a complete overview of all surgical techniques, describes all current indications of the techniques, and considers all relevant clinical aspects. The practitioner has a quick and complete overview of the current state of the art in the field. Main Topics Include: Endonasal sinus surgery - basic principles and approaches Technique of endoscopic endonasal surgery Results of endonasal sinus surgery for chronic sinusitis Results in defined patient groups Extended spectrum of endoscopic endonasal surgery Complications, side-effects and sequelae Postoperative care following endoscopic surgery Technical innovations; Summary and prospects