Abstract

•Recognition of a persistent primitive trigeminal artery (PPTA) is of clinical significance due to its association with aneurysms and several vascular variants in addition to preoperative planning.•Characteristic appearance of PPTA on MR sagittal images of the brain resembles the Greek letter tau (two prongs) and was linked to Neptune’s trident (three prongs).•Use of a bident sign as a more visually and mythologically precise description of the appearance of PPTA. A 50 year old male with an incidental finding on the MRI brain (Fig. 1).Fig. 2A) Lateral digitally subtracted catheter angiogram of a selected internal carotid artery (arrow) injection demonstrating the persistent trigeminal artery (arrowhead) passing posteriorly to join the basilar artery (open arrow). B) Cropped view of the painting “Concilio degli dei” by Raffaello Sanzio da Urbino depicting Hades holding a bident (left), next to his brother Poseidon holding a trident (middle) [10]. Zeus (right) is also pictured, without a spear.View Large Image Figure ViewerDownload Hi-res image Download (PPT) A.fetal posterior cerebral arteryB.persistent trigeminal arteryC.persistent hypoglossal arteryD.persistent otic arteryE.persistent proatlantal artery Answer on page 240 Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal viewsJournal of Clinical NeuroscienceVol. 75PreviewA persistent primitive trigeminal artery (PPTA) is the remnant of the embryonic arterial circulation in adults and is the most common type of the persistent carotid-vertebrobasilar anastomoses (with frequency 0.1–0.6%); followed by persistent hypoglossal artery (0.02–0.1%), persistent proatlantal artery and otic artery, which existence, however, remains controversial [6,7]. A PPTA arises from the proximal cavernous part of the ICA and courses posteriorly to join the basilar artery. Recognition of a PPTA is of clinical significance due to its association with aneurysms and several vascular variants [1,4]. Full-Text PDF Erratum to “Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views – Question and Is a trident or a bident? Appearance of a primitive trigeminal artery on sagittal views – Answer” [J. Clin. Neurosci. 75C (2020) 204–205 and 240–241]Journal of Clinical NeuroscienceVol. 78PreviewThe publisher regrets to inform readers that there was an error in the article title for both the question and answer articles. The correct title is ‘Is it a trident or a bident? Appearance of a persistent primitive trigeminal artery on sagittal views – Question’ and ‘Is it a trident or a bident? Appearance of a persistent primitive trigeminal artery on sagittal views – Answer’ respectively. Full-Text PDF

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