Learning objectives
•To illustrate the embryologic development of the aortic arch and describe the developmental errors
•To demonstrate the common and unusual anomalies of aortic arch system using multidetector CT with multiplanar reformation and 3D images
Background
Congenital anomalies of aortic arch take many forms.
Often no symptoms result,
and only presented as radiologic findings.
But on occasion the anomaly may lead to major cardiovascular or respiratory symptoms.
Five primary groups of anatomic arch anomalies are listed as following: 1) double aortic arch,
2) right aortic arch with mirror-image branching or abnormal branching,
3) Isolation of a subclavian artery,
4) left aortic arch with abnormal branching,
and 5) Interruption of the aortic arch.
The common anomalies are relatively easy to make a...
Findings and procedure details
Left aortic arch
A.Left aortic arch (LAA) with aberrant right subclavian artery (ARSA)
This anomaly is resulted from regression of the right aortic arch between the right common carotid artery (RCCA) and right subclavian artery (RSA) (Fig.
3).
The aberrant right subclavian artery as the last main branch of the aortic arch arises from the descending aorta and goes to the right arm,
passing behind the esophagus (Fig.
4).
It is the most common aortic arch anomaly and reported to occur in 0.5-2% of the...
Conclusion
Congenital anomalies of aorta is broad in spectrum and resulted from errors of embryologic development.
In this pictorial essay,
we present: (1) the normal anatomy and embryologic development of aorta,
(2) the double aortic arch hypothesis of Edwards,
(3) the common and uncommon anomalies of aorta and their associated imaging findings.
Understanding the embryology of aortic arch development is crucial to make a correct interpretation of images and patient care.
With the assistance of high spatial resolution and volume-rendered CT images,
it is faster and...
Personal information
L.-T.
Huang,
Y.-S.
Tsai,
M.-T.
Chuang.
Department of Radiology,
National Cheng Kung University Hospital,
College of Medicine,
National Cheng Kung University,
Tainan 704,
Taiwan,
ROC
References
1. Banka P,
Geva T,
Powell AJ,
Geggel R,
Lahiri T,
Valente AM.
Images in cardiovascular medicine.
Right aortic arch with aberrant left innominate artery: a rare vascular ring.
Circulation 2009;120:264-5.
2. Steidele RJ.
Sammlung verchiedener in der chirurg.
Prakt Lehschule Gemachten Beobb (Viena) 1778; 2:114.
3. Kimura-Hayama ET,
Melendez G,
Mendizabal AL,
Meave-Gonzalez A,
Zambrana GF,
Corona-Villalobos CP.
Uncommon congenital and acquired aortic diseases: role of multidetector CT angiography.
Radiographics : a review publication of the Radiological Society of North America,
Inc 2010;30:79-98.
4....