persistent hypoglossal artery
Common and
uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. a CTA (VRT 3D reconstructions) shows a vessel connecting the ICA with the basilar artery (annotations). b Axial CT image at the level of the hypoglossal canal shows an enlarged vessel piercing the skull base on the left, through the hypoglassal canal, which was also enlarged (black arrow). c CTA (VRT 3D reconstructions) reveals an absent proximal vertebral artery and hypoplastic contralateral vertebral artery (annotations)
A persistent hypoglossal artery is one of the persistent carotid-vertebrobasilar anastomoses. It is second in frequency to the trigeminal artery which is present approximately six times as often.
It arises from the distal cervical ICA, usually between C1 and C3. After passing through an enlarged hypoglossal canal, it joins the basilar artery inferiorly. If large, the ipsilateral vertebral artery and PCOM are often hypoplastic or absent. There is an association with concurrent aneurysms.
See also
- persistent carotid-vertebrobasilar anastomoses
- primitive arteries in the brain (mnemonic)
- persistent communications between the carotid and vertebrobasilar arteries (mnemonic)
Siehe auch:
- Arteria vertebralis
- Arteria basilaris
- Arteria trigemina
- persistierende karotidobasiläre Anastomosen
- Canalis nervi hypoglossi
und weiter:
Assoziationen und Differentialdiagnosen zu persistent hypoglossal artery:
