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Unilateral ptosis associated with paramedian thalamiic infarction
B Topcular1, D Yandim-Kuscu, M Colak
1Dr. Mazhar Osman Teaching and Research Hospital for Mental Health and Neurological Disorders, Department of Neurology, Istanbul, Turkey Ruh Sagligi ve Sinir Hastaliklari Egitim ve Arastirma Hastanesi, 3. Noroloji Klinigi, Istanbul, Turkey. btopcular@gmail.com
Summary
Unilateral paramedian thalamic infarction typically causes arousal and memory issues. This case highlights a rare instance of ipsilateral ptosis accompanying paramedian thalamic infarction.
Area of Science:
- Neuroscience
- Neurology
- Vascular Neurology
Background:
- The paramedian artery, originating from the posterior cerebral artery's P1 segment, irrigates specific thalamic nuclei, including dorsomedian, median, internal medullary lamina, and intralaminar nuclei.
- Unilateral paramedian thalamic infarctions commonly manifest with arousal, memory, language, or visuospatial deficits, alongside gaze palsies and sensorimotor impairments.
Observation:
- This report details a rare case of a 31-year-old patient presenting with unilateral ptosis and ipsilateral facial numbness.
- The patient's symptoms were associated with a right paramedian thalamic infarction.
Findings:
- The study documents an unusual presentation of paramedian thalamic infarction, where ipsilateral ptosis was a prominent symptom.
- This contrasts with the more typical clinical manifestations of paramedian thalamic infarcts.
Implications:
- This case expands the known spectrum of clinical presentations for paramedian thalamic infarctions.
- It underscores the importance of considering atypical symptoms like ptosis in the diagnosis of thalamic vascular events.

