| Summary: | A developmental venous anomaly (DVA) sometimes causes intracerebral hemorrhage, not subarachnoid hemorrhage (SAH). A 45-year-old man had sudden, severe headache. Computed tomography (CT) scan demonstrated diffuse SAH. No cerebral aneurysm or other arterial lesion, except DVA in the left frontal area, was observed after repeated digital subtraction angiography. The bleeding source was diagnosed as the DVA itself. He was treated conservatively. Two weeks later, CT and magnetic resonance imaging scans showed only residual faint hematoma at the DVA’s location. Five years later, no aneurysm or cavernous angioma was observed. Therefore, we encountered a very rare case of SAH due to DVA.
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