First-order Horner syndrome due to ipsilateral thalamic hemorrhage

# {#article-title-2} To the Editors: Blondin et al.1 described an ipsilateral first-order Horner syndrome with ptosis, miosis, and facial anhidrosis due to thalamic hemorrhage. Usually a central lesion of the sympathetic tract causes ipsilateral anhidrosis of the whole body whereas a dysfunction of the preganglionic or postganglionic neuron shows only impairment in the face, neck, and sometimes arm depending on the lesion site.2 Carmel3 reported that 15 patients with thalamotomy for dyskinesia had ipsilateral hemianhidrosis of the body. It is implausible that central Horner syndrome results …