persistierende karotidobasiläre Anastomosen
Persisitierende
Arteria trigemina links als Zufallsbefund in der CTA. Deutlicher Kalibersprung der A. basilaris an der Einmündung. Linkes Bild Volumen Rendering (Blick von dorsal auf den Clivus), rechts schräg koronare MIP.
Zufallsbefund
einer persistierenden A. trigemina, also einer Verbindung von der A. carotis interna zur A. basilaris, die normalerweise in der Embryonalzeit zurückgebildet wird. Hier finden sich weitere Anomalien: Die A. basilaris ist streckenweise nur sehr schwach ausgebildet. Die A. trigemina mündet nach Abgabe der Aa. cerebelli superiores in die gegenseitige A. cerebri posterior während die andere A. cerebri posterior von der A. communicans posterior gespeist wird. Der Pfeil zeigt auf die von rechts kommende A. trigemina. (Bilder aus einer T1-3D-KM-Serie als Volumenrendering)
Zufallsbefund
einer persistierenden A. trigemina, also einer Verbindung von der A. carotis interna zur A. basilaris, die normalerweise in der Embryonalzeit zurückgebildet wird. Hier finden sich weitere Anomalien: Die A. basilaris ist streckenweise nur sehr schwach ausgebildet. Die A. trigemina mündet nach Abgabe der Aa. cerebelli superiores in die gegenseitige A. cerebri posterior während die andere A. cerebri posterior von der A. communicans posterior gespeist wird. Der Pfeil zeigt auf die A. trigemina von rechts kommend. (Bilder aus einer T1-3D-KM-Serie als 8mm-MIP )
Common and
uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. CTA (VRT 3D reconstructions) shows a left-sided foetal Pcom (yellow arrow)
Common and
uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. CTA (VRT 3D reconstructions) shows a bilateral foetal Pcom (yellow arrows)
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)
Common and
uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. CTA (VRT 3D reconstructions) shows a left-sided trigeminal artery joining the basilar artery. The basilar artery (which is relatively hypoplastic, proximal to the connection site) gives rise to the right PCA, while the left PCA arises from the ICA (foetal PCom) (Saltzman’s type II or Weon’s type 3) (annotations)
Common and
uncommon intracranial arterial anatomic variations in multi-detector computed tomography angiography (MDCTA). What radiologists should be aware of. CTA (VRT 3D reconstructions) shows a case of the origin of the occipital artery from the ICA (red arrow)
Persistent
carotid-vertebrobasilar anastomoses • Persistent hypoglossal artery - Ganzer Fall bei Radiopaedia
Persistent
carotid-vertebrobasilar anastomoses • Proatlantal intersegmental artery - Ganzer Fall bei Radiopaedia
Persistent
carotid-vertebrobasilar anastomoses • Persistent trigeminal artery - Ganzer Fall bei Radiopaedia
Persistent
carotid-vertebrobasilar anastomoses • Persistent hypoglossal artery - Ganzer Fall bei Radiopaedia
Persistent
primitive trigeminal artery • Persistent primitive trigeminal artery - Ganzer Fall bei Radiopaedia
The persistent carotid-vertebrobasilar anastomoses are variant anatomical arterial communications between the anterior and posterior circulations due to abnormal embryological development of the vertebrobasilar system. They are named, with the exception of the proatlantal artery, using the cranial nerves with which they run:
- persistent trigeminal artery
- arises from proximal cavernous ICA
- most common persistent carotid-vertebrobasilar anastomosis
- two types - lateral and medial
- Saltzman classification
- type I: absent ipsilateral posterior communicating artery
- type II: fetal origin of ipsilateral posterior communicating artery
- persistent otic (acoustic) artery
- controversial, perhaps non-existent
- arises from petrous ICA
- rare, as it is the first anastomosis to regress
- persistent hypoglossal artery
- arises from cervical ICA at C1 to C3 levels
- persistent proatlantal artery
- type I arises from internal carotid artery
- type II arises from external carotid artery
A mnemonic to help remember these persistent carotid-vertebrobasilar anastomoses is HOT Pepper.
Siehe auch:
- Arteria carotis externa
- Arteria carotis interna
- Arteria trigemina
- persistent hypoglossal artery
- persistent proatalantal intersegmental artery
- Persistent communications between the carotid and vertebrobasilar arteries (mnemonic)
- posterior communicating artery (PCOM)
- Persistent otic (acoustic) artery
- persistent carotid-vertebrobasilar anastomoses type II
und weiter:
Assoziationen und Differentialdiagnosen zu persistierende karotidobasiläre Anastomosen:
