Syringomyelia associated with adhesive spinal arachnoiditis: MRI

We reviewed the MRI of seven patients with syringomyelia associated with su rgically proven adhesive spinal arachnoiditis to describe clinical and MRI findings in this condition. Using 0.5, 1.0 or 1.5 tesla units, we obtained sagittal T1- and T2-weighted spin-echo and axial T1-weighted images. Additi onal sagittal T2-weighted images were obtained without using motion-artefac t suppression. Contrast medium was given intravenously to five patients. Th e syrinx cavities were thoracic in five cases, cervicothoracic in one, and extended from C4 to L1 in one. No Chiari malformation or craniovertebral ju nction anomaly was demonstrated. Meningeal thickening was seen on T2-weight ed sagittal images only in one case. Cord deformity due to adhesion or disp lacement due to an associated arachnoid cyst was seen in all cases best dem onstrated on axial images. Focal blurring of the syrinx wall on axial image s was seen in six patients. Flow voids were seen in the syrinx fluid in all cases on T2-weighted images obtained without motion-artefact suppression. No abnormal contrast enhancement was demonstrated.