Progressive multifocal leukoencephalopathy 11 years after liver transplantation: a case report.

Progressive multifocal leukoencephalopathy (PML) is an opportunistic infection of the central nervous system caused by JC virus. Only ten cases of PML have been reported so far in liver transplant recipients. We present a case of liver posttransplantation PML with characteristic clinical and brain MRI findings, but with an atypical late onset, developed 11 years after transplantation and after single-drug, long-term (8 years), and low-dose (750 mg twice a day) immunosuppression with mycophenolate mofetil (MMF). This is the latest onset of PML associated to liver transplant reported. The present case should help physicians to be aware of PML after transplantation, even in the long term and even under low doses of immunosuppressants, especially MMF.