PT - JOURNAL ARTICLE AU - Nikhil Dongre AU - Varsha Ambwani AU - Vinita Elizabeth Mani AU - Vimal Kumar Paliwal TI - Alien-hand syndrome with mirror movements in hereditary diffuse leukoencephalopathy with spheroids AID - 10.1136/practneurol-2021-003237 DP - 2022 Aug 01 TA - Practical Neurology PG - 321--323 VI - 22 IP - 4 4099 - http://pn.bmj.com/content/22/4/321.short 4100 - http://pn.bmj.com/content/22/4/321.full SO - Pract Neurol2022 Aug 01; 22 AB - Hereditary diffuse leukoencephalopathy with spheroids is a rare genetic disorder caused by mutations of the colony-stimulating factor 1 receptor gene. It is an adult-onset leukodystrophy, with a wide spectrum of neurological and psychiatric manifestations that includes Parkinsonism, dementia, seizures, limb weakness, spasticity and abnormal motor behaviour. Alien-hand syndrome and mirror movements are rare manifestations of this and other neurodegenerative disorders. We describe a woman with progressive limb and trunk rigidity, Parkinsonism and dementia, who also had involuntary left arm levitation (part of the posterior variant of alien-hand syndrome) and left-hand mirror movements. We discuss the different types of alien-hand syndrome, and the likely mechanisms of arm levitation and mirror movements.