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The craniovertebral junction is a complex articulation between occiput, atlas and axis and supporting ligaments. It encloses the soft tissue structures of the cervicomedullary junction which includes medulla, spinal cord and lower cranial nerves. It is a potential site of variety of radiologic diagnosis and misdiagnosis. In this study we have reviewed acquired abnormalities of the craniovertebral junction and evaluate usefulness of Magnetic Resonance Imaging and Computed Tomography. Material and methods: A prospective study was carried on 44 patients clinically suspected to have craniovertebral junction abnormalities of acquired origin. Computed Tomography and Magnetic Resonance Imaging were performed in all patients and the imaging features in both the modalities were recorded, analyzed and studied. Results: On completion of the study, analysis of the obtained radiological data was done. Traumatic injuries were the most common acquired craniovertebral junction abnormality. Odontoid fracture predominantly type II was the commonest injury noted. Tuberculosis of craniovertebral junction showing bone erosion and enhancing soft tissue component was the next common abnormality observed. Rheumatoid arthritis showing pannus formation and bone erosion was the other abnormality observed in this study. Conclusion: Magnetic Resonance Imaging is the imaging mode of choice for evaluation of the craniovertebral junction for a variety of reasons like its superior morphologic demonstration of soft tissue structures with multiplanar capabilities. However a Multislice, Spiral or Helical, 3-D reconstructed Computed Tomography image is as good and sometimes is better for clear-cut understanding of bony abnormalities at craniovertebral junction.

Role of CT and MRI in Evaluation of Acquired Disorders of Craniovertebral Junction in a Rural based Medical College