Novel Anatomical Classification of Spontaneous Thalamic Hemorrhage Classified by Vascular Territory of Thalamus.

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Novel Anatomical Classification of Spontaneous Thalamic Hemorrhage Classified by Vascular Territory of Thalamus.

World Neurosurg. 2017 May 19;:

Authors: Teramoto S, Yamamoto T, Nakao Y, Watanabe M

Abstract
BACKGROUND: Spontaneous thalamic hemorrhage has increased in incidence in recent years. The characteristics of thalamic hemorrhage were analyzed based on the vascular territories of the thalamus.
METHODS: Retrospective analysis included 303 consecutive patients with spontaneous thalamic hemorrhage. Thalamic hemorrhage was classified into four types: anterior type (supplied mainly by the tuberothalamic artery), medial (mainly paramedian thalamic-subthalamic artery), lateral (mainly thalamogeniculate artery), and posterior (mainly posterior choroidal artery). The baseline characteristics, complications, and functional outcomes were assessed.
RESULTS: The anterior type was found in 10 patients (3.3%), the medial type in 47 (15.5%), the lateral type in 230 (75.9%), and the posterior type in 16 (5.3%). Intracerebral hemorrhage volume was smallest in the anterior type, and significantly smaller than in the medial (P = 0.002) and lateral types (P < 0.001). Intraventricular hemorrhage (IVH) or acute hydrocephalus was significantly associated with the medial type (P < 0.01 or P < 0.01, respectively). Non-IVH or non-acute hydrocephalus was significantly associated with the anterior (P < 0.05 or P < 0.05, respectively) and lateral (P < 0.05 or P < 0.05, respectively) types. Emergency surgery was correlated only with the medial type (P < 0.01). The independent predictors of poor outcome were age (odds ratio [OR], 1.07; P = 0.002), admission National Institutes of Health Stroke Scale score (OR, 1.32; P < 0.001), and type of thalamic hemorrhage (OR, 2.08; P = 0.038).
CONCLUSIONS: The present study proposed a novel anatomical classification of thalamic hemorrhage according to the major thalamic vascular territories.

PMID: 28532917 [PubMed - as supplied by publisher]

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