The evolution of microscopic and endoscopic sur- ic references of the nose, paranasal sinuses, and re- gery of the nose was made possible due to the de- lated structures, essential for everyone concerned tailed knowledge acquired by anatomists and sur- with microendoscopic surgery of the paranasal si- geons on the macro- and microanatomy of this re- nuses. gion. I would like to thank Prof. Navarro once more Unveiling the complex structure of the middle for his teachings, which have greatly contributed to third of the face has always been a challenge to my own professional development and to that of so Prof. Navarro. The contribution of his studies to many colleagues all over the world. the many specialties is immeasurable. The present work comprises information on the main anatom- Aldo Stamm Preface In the field of health sciences, steady and rapid ad- under the surgical microscope), which are useful vances in knowledge demand from the profession- for microsurgery and endoscopic surgery within al true commitment and continued efforts to keep several medical specialties.