Nontraumatic Subarachnoid Hemorrhage from Left Carotid Siphon and Bifurcation

**Semantic type:** Finding

**Definition:** Evidence of nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation.

**Synonyms:** - Nontraumatic subarachnoid hemorrhage from left carotid siphon and bifurcation