Concurrent presentation of perimesencephalic subarachnoid hemorrhage and ischemic stroke

摘要

Perimesencephalic subarachnoid hemorrhage (SAH) is a relatively benign form of SAH. The cause of this condition is unknown but venous leakage has been believed to be the most common etiology. This report describes a patient with perimesencephalic SAH who presented with a concurrent acute pontine infarct demonstrated on diffusion-weighted MRI. These findings suggest that in some instances perimesencephalic SAH is caused by rupture of a perforating artery.