Introduction

Abstract

Modern diagnostic imaging technology such as computed tomography (CT) and magnetic resonance imaging (MRI) has enabled us to achieve a better understanding of the complex aspects of diseases of the cervical spine. Stenosis of the cervical canal has become one of the more interesting and better understood areas within the wide spectrum of pathology found in the cervical segment of the spinal column. It is now possible to describe a more meaningful classification of the many clinical situations and achieve a better understanding of their pathogenesis. In the establishment of indications for surgical intervention, these new diagnostic methods have permitted the identification and definition of significant differences between disease entities and, as a consequence, have provided more specific criteria for selecting surgical approaches and developing the modern surgical techniques.