By focusing on how to establish clear indications for surgery and how to improve surgical approaches in endoscopic paranasal sinus surgery, this practical operating manual appeals to the beginner as well as to the practicing surgeon. Techniques covered range from simple procedures to the most advanced applications, including tumor and trauma surgery, and procedures involving the anterior skull base.Based on their clinical and considerable teaching experience, the authors have chosen an approach that responds directly to patients concerns and which is set within a simple framework based on the questions of Who? When? Why? and How?:Who? offers guidelines on patient selection and dealing with patients' expectations,When? discusses optimizing the diagnosis and medical management as well as the timing of surgery,Why? evaluates realistic surgical goals with regard to patients' symptoms and their quality of life,How? describes surgical techniques step-by-step, explains terminology, discusses surgical modifications and alternatives, and offers guidelines for the management of complications.Nearly 1,000 illustrations of exceptional quality and a 3-hour DVD of surgical procedures and interviews with patients supplement the step-by-step instructions and practical tips in the text.