Diagnostic Value of MRI for Spinal Infectious Diseases and Metastases.

概要

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MRI findings in 20 patients of spinal infection were studied to investigate the diagnostic value of MRI for spinal infectious diseases. Of these, 11 patients were tuberculous spondylitis and 9 patients were pyogenic spondylitis. The 20 patients consisted of 12 males and 8 females with a mean age of 56 years ranged from 18 to 77 years. In the cervical and thoracic spine, T1-or T2-weighted sagittal images of infectious spondylitis showed marked destruction of the disc space, though images of spinal metastases showed normal disc. In the lumber spine, T1-or T2-images of 5 patients were not useful in differentiating infectious diseases and metastases because of severe disc destruction due to degenerative changes. In such cases, postcontrast (Gd-DTPA) T1-weghted scans showed enhancement of infectious areas of the disc in infectious diseases. MRI using STIR technique were also useful to determine the accurate diagnosis of metastatic lesions.