Persistent fifth aortic arch: the "great pretender" in clinical practice

Area of Science:

• Cardiovascular Embryology
• Congenital Heart Disease
• Medical Imaging

Background:

• The persistent fifth aortic arch is a rare and controversial congenital condition.
• Its embryological origin has been debated for over a century.
• The condition presents with variable anatomical forms and physiological consequences, often mimicking other structures.

Purpose of the Study:

• To demonstrate cases fulfilling the contemporary definition of persistent fifth aortic arch.
• To acknowledge and discuss the embryological controversies surrounding this condition.
• To outline key diagnostic features, emphasizing new cross-sectional imaging techniques.

Main Methods:

• Review of clinical cases meeting the definition of persistent fifth aortic arch.
• Analysis of anatomical variations and physiological consequences.
• Evaluation of diagnostic features, including advanced cross-sectional imaging.

Main Results:

• Demonstration of cases conforming to the current definition of persistent fifth aortic arch.
• Highlighting the unpredictable physiological properties of these anomalous vessels.
• Identification of key diagnostic indicators through modern imaging modalities.

Conclusions:

• The persistent fifth aortic arch remains an enigmatic condition with unresolved embryological questions.
• Accurate diagnosis relies on understanding its varied presentations and utilizing advanced imaging.
• Further research is needed to fully elucidate its developmental origins and clinical implications.