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Updated: Aug 3, 2026
Registered Bioimaging of Nanomaterials for Diagnostic and Therapeutic Monitoring
Published on: December 9, 2010
Diffusion-weighted MRI and ADC mapping in FK506 neurotoxicity
1Department of Diagnostic Radiology, The Catholic University of Korea, Seoul, Korea.
Abstract:
FK506 is a newly developed potent immunosuppressant for preventing rejection after organ transplantation. However, FK506 can induce central nervous system toxicity. Until now the pathogenic mechanism of FK506 neurotoxicity was unclear. We report the findings of diffusion-weighted MRI and apparent diffusion coefficient (ADC) mapping of a FK506 neurotoxicity patient who showed increased signal intensities in both parieto-occipital lobes on T(2) weighted images, diffusion-weighted images and ADC maps. These findings suggest that a vasogenic oedema rather than a cytotoxic oedema may play a pivotal role in FK506 neurotoxicity pathogenesis.
Insights
FK506, an immunosuppressant, can cause neurotoxicity. Diffusion-weighted MRI revealed vasogenic edema, suggesting a key role in FK506 central nervous system toxicity pathogenesis.
Area of Science:
- Neuroscience
- Radiology
- Pharmacology
Background:
- FK506 is a potent immunosuppressant crucial for preventing organ transplant rejection.
- The pathogenic mechanisms underlying FK506-induced neurotoxicity remain unclear.
- Understanding FK506 neurotoxicity is vital for patient safety in transplantation.
Observation:
- A patient treated with FK506 exhibited central nervous system toxicity.
- Imaging revealed increased signal intensities in the parieto-occipital lobes on T2-weighted, diffusion-weighted images, and ADC maps.
- These imaging findings were consistent with edema in specific brain regions.
Findings:
- Diffusion-weighted MRI and ADC mapping were utilized to investigate FK506 neurotoxicity.
- The study identified characteristic imaging patterns associated with FK506-induced central nervous system toxicity.
- Findings suggest vasogenic edema, not cytotoxic edema, is implicated in FK506 neurotoxicity.
Implications:
- This research clarifies a potential mechanism of FK506 neurotoxicity.
- The findings may guide the diagnosis and management of FK506-related neurological side effects.
- Further research can explore therapeutic strategies targeting vasogenic edema in FK506-treated patients.
