%0 Journal Article %A Abdul Badran %A Carla Moran %A Alasdair J Coles %T Hypothyroid ataxia complicating monoclonal antibody therapy %D 2017 %R 10.1136/practneurol-2017-001713 %J Practical Neurology %P practneurol-2017-001713 %X We present a case of cerebellar dysfunction due to severe hypothyroidism induced by pembrolizumab, a member of the ‘immune checkpoint inhibitor’ class of cancer immunotherapies. Thyroxine replacement completely resolved his symptoms and signs. We also discuss the neurological immune-related complications of checkpoint inhibitors. %U https://pn.bmj.com/content/practneurol/early/2017/10/21/practneurol-2017-001713.full.pdf