PT - JOURNAL ARTICLE AU - Abdul Badran AU - Carla Moran AU - Alasdair J Coles TI - Hypothyroid ataxia complicating monoclonal antibody therapy AID - 10.1136/practneurol-2017-001713 DP - 2017 Dec 01 TA - Practical Neurology PG - 482--484 VI - 17 IP - 6 4099 - http://pn.bmj.com/content/17/6/482.short 4100 - http://pn.bmj.com/content/17/6/482.full SO - Pract Neurol2017 Dec 01; 17 AB - 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.