Dr. Leonardo Rangel Castilla is a neurosurgeon at Mayo Clinic in Rochester, MN, specializing in neurovascular surgery as well as neuroradiology-interventional surgery. His clinical focus includes: brain aneurysm, brain avm, carotid artery disease, carotid artery stenosis, cavernous malformations, brain stem cavernous malformations, dural arteriovenous fistula, spinal arteriovenous fistula, hydrocephalus, intracerebral hemorrhage, intraventricular tumors , ischemic stroke, moyamoya disease, pseudotumor cerebri, subarachnoid hemorrhage, vertebrobasilar insufficiency, carotid endarterectomy, and carotid stent procedure.