fetal origin of the posterior cerebral artery

Common and

uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. a CTA (VRT reconstructions) shows a right-sided foetal Pcom (black arrow) with a large aneurysm at the origin of the vessel (yellow arrow). b Digital subtraction angiography (lateral view) of the right ICA shows a foetal Pcom (red arrow) and large aneurysm at the origin of the vessel (black arrow), which cannot be compromised. c Digital subtraction angiography (AP view) of the left vertebral artery. The posterior cerebral artery on the right is not opacified (definition of a foetal Pcom). b Post-embolisation digital subtraction angiography (lateral view) of the right ICA shows good patency of the foetal Pcom (red arrow) and complete obliteration of the aneurysmal sac (black arrow)

Common and

uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. a CTA (VRT reconstructions) shows a right-sided foetal Pcom (red arrow). b CT oblique MPR image shows an increased wall thickness (red arrow) and intimal flap (yellow arrow) of the dissected right ICA. c Axial CT image at the level of the third ventricle shows right-sided occipital and posterior parietal lobe infarcts (red arrows)