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Northcutt BG, Seeburg DP, Shin J, et al. High-Resolution MRI Findings following Trigeminal Rhizotomy. AJNR Am J Neuroradiol. 2016;37(10):1920-1924doi: 10.3174/ajnr.A4868.
Northcutt, B. G., Seeburg, D. P., Shin, J., Aygun, N., Herzka, D. A., Theodros, D., Goodwin, C. R., Bettegowda, C., Lim, M., & Blitz, A. M. (2016). High-Resolution MRI Findings following Trigeminal Rhizotomy. AJNR. American journal of neuroradiology, 37(10), 1920-1924. https://doi.org/10.3174/ajnr.A4868
Northcutt, B G, et al. "High-Resolution MRI Findings following Trigeminal Rhizotomy." AJNR. American journal of neuroradiology vol. 37,10 (2016): 1920-1924. doi: https://doi.org/10.3174/ajnr.A4868
Northcutt BG, Seeburg DP, Shin J, Aygun N, Herzka DA, Theodros D, Goodwin CR, Bettegowda C, Lim M, Blitz AM. High-Resolution MRI Findings following Trigeminal Rhizotomy. AJNR Am J Neuroradiol. 2016 Oct;37(10):1920-1924. doi: 10.3174/ajnr.A4868. Epub 2016 Jun 30. PMID: 27365326; PMCID: PMC7960471.
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AJNR Am J Neuroradiol. 2016 Oct;37(10):1920-1924. doi: 10.3174/ajnr.A4868. Epub 2016 Jun 30.

High-Resolution MRI Findings following Trigeminal Rhizotomy.

AJNR. American journal of neuroradiology

B G Northcutt, D P Seeburg, J Shin, N Aygun, D A Herzka, D Theodros, C R Goodwin, C Bettegowda, M Lim, A M Blitz

Affiliations

  1. From the Departments of Radiology and Radiologic Sciences, Division of Neuroradiology (B.G.N., D.P.S., J.S., N.A., A.M.B.).
  2. Biomedical Engineering (D.A.H.).
  3. Neurosurgery (D.T., C.R.G., C.B., M.L.), Johns Hopkins Hospital, Baltimore, Maryland.
  4. From the Departments of Radiology and Radiologic Sciences, Division of Neuroradiology (B.G.N., D.P.S., J.S., N.A., A.M.B.) [email protected].

PMID: 27365326 PMCID: PMC7960471 DOI: 10.3174/ajnr.A4868

Abstract

BACKGROUND AND PURPOSE: Patients with trigeminal neuralgia often undergo trigeminal rhizotomy via radiofrequency thermocoagulation or glycerol injection for treatment of symptoms. To date, radiologic changes in patients with trigeminal neuralgia post-rhizotomy have not been described, to our knowledge. The aim of this study was to evaluate patients after trigeminal rhizotomy to characterize post-rhizotomy changes on 3D high-resolution MR imaging.

MATERIALS AND METHODS: A retrospective review of trigeminal neuralgia protocol studies was performed in 26 patients after rhizotomy compared with 54 treatment-naïve subjects with trigeminal neuralgia. Examinations were reviewed independently by 2 neuroradiologists blinded to the side of symptoms and treatment history. The symmetry of Meckel's cave on constructive interference in steady-state and the presence of contrast enhancement within the trigeminal nerves on volumetric interpolated breath-hold examination images were assessed subjectively. The signal intensity of Meckel's cave was measured on coronal noncontrast constructive interference in steady-state imaging on each side.

RESULTS: Post-rhizotomy changes included subjective clumping of nerve roots and/or decreased constructive interference in steady-state signal intensity within Meckel's cave, which was identified in 17/26 (65%) patients after rhizotomy and 3/54 (6%) treatment-naïve patients (

CONCLUSIONS: Post-trigeminal rhizotomy findings frequently include nerve clumping and decreased constructive interference in steady-state signal intensity in Meckel's cave. Small areas of temporal lobe encephalomalacia are encountered less frequently.

© 2016 by American Journal of Neuroradiology.

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