A 56-year-old woman developed progressive subacute lower limb weakness with sensory and autonomic abnormalities. She had received a living-donor kidney transplantation 21 years before for end-stage chronic kidney disease and took mycophenolate mofetil and prednisolone. MR scan of the spinal cord showed bilateral cauda equina gadolinium enhancement and MR scan of the brain showed enhancing nodular hyperintensities in the internal capsule and globus pallidus. Cerebrospinal fluid (CSF) showed a pleocytosis with extremely low glucose, and positive DNA-PCR for Epstein-Barr virus. Her condition worsened despite empirically guided antimicrobial treatment. CSF immunophenotyping later identified mature, clonal B lymphocytes of large size, expressing CD19, CD20, CD200 antigens, and kappa light chain immunoglobulin, with absent CD5 and CD10 expression. We diagnosed a myeloradiculopathy from a monomorphic post-transplant lymphoproliferative disorder. This condition occurs after kidney transplantation and falls on the lymphoma spectrum. We review its clinical features, diagnosis and management.
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