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Link to original content: https://doi.org/10.1007/s00415-014-7437-1
Gadolinium enhancement patterns of tumefactive demyelinating lesions: correlations with brain biopsy findings and pathophysiology | Journal of Neurology Skip to main content

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Gadolinium enhancement patterns of tumefactive demyelinating lesions: correlations with brain biopsy findings and pathophysiology

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Abstract

Tumefactive demyelinating lesions (TDLs) can mimic brain tumors on radiological images. TDLs are often referred to as tumefactive multiple sclerosis (TMS), but the heterogeneous nature and monophasic course of TDLs do not fulfill clinical and magnetic resonance imaging (MRI) criteria for multiple sclerosis. Redefining TDLs, TMS and other inflammatory brain lesions is essential for the accurate clinical diagnosis of extensive demyelinating brain lesions. We retrospectively analyzed MRI from nine TDL cases that underwent brain biopsy. Patterns of gadolinium enhancement on MRI were categorized as homogenous, inhomogeneous, patchy and diffuse, open ring or irregular rim, and were compared with pathological hallmarks including demyelination, central necrosis, macrophage infiltration, angiogenesis and perivascular lymphocytic cuffing. All cases had coexistence of demyelinating features and axonal loss. Open-ring and irregular rim patterns of gadolinium enhancement were associated with macrophage infiltrations and angiogenesis at the inflammatory border. An inhomogeneous pattern of gadolinium enhancement was associated with perivascular lymphocytic cuffing. Central necrosis was seen in cases of severe multiple sclerosis and hemorrhagic leukoencephalopathy. These results suggest that the radiological features of TDLs may be related to different pathological processes, and indicate that MRI may be useful in understanding their pathophysiology. Further investigation is needed to determine the precise disease entity of these inflammatory demyelinating brain lesions.

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Acknowledgments

The authors would like to thank Drs. T. Maruyama, Y. Muragaki, T. Ochiai, and O. Kubo for biopsy procedures and valuable suggestions. The authors thank Dr. Takahashi (Department of Neurology, Tohoku University) for the analysis of AQP-4 antibodies. A summary of this paper was reported at the 61st meeting of the American Academy of Neurology in 2009. This study was supported by a Health and Labour Sciences Research Grant on Intractable Diseases (Neuroimmunological Diseases) from the Ministry of Health, Labour and Welfare of Japan.

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On behalf of all authors, the corresponding author states that there are no conflict of interest.

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The ethics committee at Tokyo Women’s Medical University approved this study. Owing to the retrospective nature of the study, ethics approval was not mandatory.

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Correspondence to Masaki Kobayashi.

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Kobayashi, M., Shimizu, Y., Shibata, N. et al. Gadolinium enhancement patterns of tumefactive demyelinating lesions: correlations with brain biopsy findings and pathophysiology. J Neurol 261, 1902–1910 (2014). https://doi.org/10.1007/s00415-014-7437-1

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  • DOI: https://doi.org/10.1007/s00415-014-7437-1

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