[Endonasal microsurgery. Anatomical basis, physiopathological justification, attempt at codification of the interventions].

This report about endonasal microsurgery has two sections: the first one deals with anatomy and the structure of nasal cavities, the methods as well as the technical and technological means required for the different types of surgery. The second section deals with nasal pathology in general and the new possibility of endonasal treatment. Endonasal surgery is not recent but the introduction of the use of the operating microscope gives such a precision in conception and realisation as to open new vistas concerning pathology and the corresponding treatment of nasal diseases. This is what we tried to demonstrate.