Neurosurgery
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The ambiguous term precuneal artery (PA) has several synonyms and anatomic definitions. ⋯ a, anastomoses of precuneal branches with the contralateral hemisphere parameterACA, anterior cerebral arteryACoA, anterior communicating arteryARCS, ascending ramus of the cingulate sulcusb, precuneal branches anastomosing with the ipsilateral posterior cerebral artery parameter; posterior cerebral arteryBMI, body mass indexc, precuneal branches at the medial hemispheric surface parameterCC, corpus callosumd, length of the ascending ramus of the cingulate sulcus parametere, distance of the precuneal artery origin from the posterior limit of the corpus callosum parameterIIPA, inferior internal parietal arteryPA, precuneal arteryPCA, posterior cerebral arteryPcA, pericallosal arterySIPA, superior internal parietal artery.
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Medullary-bridging vein dural arteriovenous fistula (DAVF) is an uncommon type of DAVF with an aggressive clinical course due to direct fistulous shunting into medullary and brainstem veins. Important considerations need to be given to retrograde embolic migration or perforator involvement while treating these fistulas endovascularly with a liquid embolic agent. We report a lateral spinal artery feeding the DAVF, the recognition of which is important to avoid potential catastrophic complications during definitive therapy, and which has not been described before. ⋯ DAVF, vein dural arteriovenous fistulaLSA, lateral spinal arteryPICA, posterior inferior cerebellar artery.
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Before the development of the adult ophthalmic artery (OA), the primitive maxillary artery (MA), the primitive dorsal OA, and the primitive ventral OA contribute to the vascularization of early ocular structures, whereas the primitive olfactory artery (OlfA) forms in the vicinity of the optic vesicle. These vessels are involved in several OA origin variants. ⋯ ACA, anterior cerebral arteryDSA, digital subtraction angiographyICA, internal carotid arteryILT, inferolateral trunkMA, maxillary arteryMMA, middle meningeal arteryMRA, magnetic resonance angiographyOA, ophthalmic arteryOlfA, olfactory arteryPComA, posterior communicating arterySOF, superior orbital fissure.
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Revascularization of the posterior cerebral artery (PCA) can be essential for treating complex cerebral aneurysms in the posterior circulation, and it is considered technically challenging. To help decrease the difficulty of this technique, we developed the minimum transpetrosal approach (MTPA). ⋯ MTPA, minimum transpetrosal approachPCA, posterior cerebral arterySTA, superficial temporal artery.