Nivolumab-induced acute demyelinating polyradiculoneuropathy mimicking Guillain-Barré syndrome

- A case of Nivolumab-induced acute demyelinating polyradiculoneuropathy was reported.
- He showed a clinical course mimicking Guillain-Barré syndrome.
- MRI of the lumbar spine showed gadolinium enhancement of nerve roots and cauda equine.
- He was effectively treated with steroid pulse therapy and IVIg.