====== Pericallosal artery ======

{{ ::pericallosalartery.jpg?500|}}

The pericallosal [[artery]] is the continuation of the [[anterior cerebral artery]] (ACA) and is named after the origin of the [[callosomarginal artery]]. As it courses over the superior surface of the [[corpus callosum]] (CC) in the [[pericallosal cistern]] it gives off many small branches to the CC, forming the [[pericallosal pial plexus]] (pericallosal moustache).


The pericallosal arteries are sonographically visible since the first trimester in 3D ultrasound scans of fetuses found to have a normal corpus callosum at follow-up
((Conturso R, Contro E, Bellussi F, Youssef A, Pacella G, Martelli F, Rizzo N,
Pilu G, Ghi T. Demonstration of the Pericallosal Artery at 11-13 Weeks of
Gestation Using 3D Ultrasound. Fetal Diagn Ther. 2014 Nov 1. [Epub ahead of
print] PubMed PMID: 25376870.
)).

The PA can routinely be observed at the first-trimester evaluation with color Doppler ultrasonography using the mid-sagittal view of the fetal head. The presence of an abnormal vascular map of the PA by Doppler ultrasonography at 11-14 weeks raises the suspicion of [[Agenesis of the corpus callosum]]
((Díaz-Guerrero L, Giugni-Chalbaud G, Sosa-Olavarría A. Assessment of
pericallosal arteries by color Doppler ultrasonography at 11-14 weeks: an early
marker of fetal corpus callosum development in normal fetuses and agenesis in
cases with chromosomal anomalies. Fetal Diagn Ther. 2013;34(2):85-9. doi:
10.1159/000351657. Epub 2013 Jun 17. PubMed PMID: 23774062.)).

The use of 3-D power Doppler sonoangiography enables the precise demonstration of the normal variants of the fetal pericallosal artery with different origins of the [[callosomarginal artery]]. The knowledge of normal variants helps to detect pathological forms of the pericallosal artery
((Pashaj S, Merz E. Prenatal demonstration of normal variants of the
pericallosal artery by 3D ultrasound. Ultraschall Med. 2014 Apr;35(2):129-36.
doi: 10.1055/s-0033-1355576. Epub 2013 Dec 20. PubMed PMID: 24363241.)).

===== Pericallosal artery aneurysm =====

see [[Pericallosal artery aneurysm]]