These three were as follows: a genetically confirmed CSF1R‐leukoencephalopathy patient (also had confluent frontal white matter hyperintensities); a genetically confirmed Huntington's disease patient (with only subtle chorea); and a patient with autoimmune encephalitis (with CSF confirmation of NMDAr antibodies). The gene discussed is CSF1R; the disease is Leukoencephalopathy.