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White matter changes caused by chronic solvent abuse
N Yamanouchi1, S Okada, K Kodama
1Department of Neuropsychiatry, School of Medicine, Chiba University, Japan.
AJNR. American Journal of Neuroradiology
|September 1, 1995
Summary
This study reveals that chronic solvent abuse, particularly pure toluene, can cause significant white matter brain damage in abusers. Early-stage changes may precede apparent brain atrophy, suggesting a distinct toxic effect.
Area of Science:
- Neuroimaging
- Toxicology
- Neurology
Background:
- Solvent abuse is a global health concern.
- Pure industrial toluene abuse is prevalent in Japan.
- Understanding solvent-induced brain damage is crucial.
Purpose of the Study:
- To investigate brain damage in Japanese solvent abusers.
- To correlate specific solvent types with observed brain pathologies.
- To characterize early neuroimaging findings in solvent abuse.
Main Methods:
- Magnetic Resonance (MR) imaging was performed on 20 solvent abusers.
- A 1.5-T MR imaging system was utilized.
- Imaging sequences included T1-weighted, T2-weighted, and proton density-weighted images.
Main Results:
- White matter hyperintensities were observed in the cerebrum, brain stem, and cerebellum.
- Proton density-weighted images best visualized white matter changes.
- Pure toluene abusers showed restricted/intermediate changes, while lacquer thinner abusers exhibited diffuse changes and brain atrophy.
Conclusions:
- Restricted white matter changes can cause neurological symptoms before significant brain atrophy.
- These early changes may represent an early or distinct form of diffuse white matter damage.
- Pure toluene abuse may be linked to a qualitatively different neurotoxic effect.