Rapidly progressive dementia in tacrolimus neurotoxicity: rare but reversible

Area of Science:

• Neuroscience
• Immunology
• Transplantation Medicine

Background:

• Tacrolimus is a vital immunosuppressant in organ transplantation.
• Neurotoxicity is a known, albeit varied, complication of tacrolimus therapy.
• Immunosuppressive drugs can lead to substantial patient morbidity.

Observation:

• A liver transplant recipient developed rapid-onset dementia post-surgery.
• Cerebral imaging showed restricted diffusion in the caudate and putamen, mimicking Creutzfeldt-Jakob disease.
• Tacrolimus levels remained within the therapeutic range throughout the observation period.

Findings:

• The patient's dementia resolved completely within 4-6 weeks of tacrolimus cessation.
• This case demonstrates tacrolimus-induced neurotoxicity presenting as rapidly progressive dementia.
• Neurotoxicity occurred despite documented therapeutic tacrolimus blood concentrations.

Implications:

• Tacrolimus neurotoxicity should be considered in transplant patients with rapidly progressing dementia.
• Monitoring drug levels alone may not be sufficient to rule out tacrolimus toxicity.
• Early recognition and withdrawal of tacrolimus are crucial for favorable neurological outcomes in transplant recipients.