[Diverticulum of the brachiocephalic trunk--angiographic image and embryologic significance]

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Developmental Biology

Background:

• Congenital heart diseases (CHDs) encompass a range of structural abnormalities present at birth.
• The brachiocephalic trunk, the first major artery branching from the aortic arch, is crucial for supplying blood to the head and right arm.
• Anomalies of the aortic arch and its branches can be associated with various CHDs.

Purpose of the Study:

• To describe a specific anomaly, a diverticulum of the brachiocephalic trunk, observed in a cohort of pediatric patients.
• To investigate the potential embryological origin of this diverticulum in relation to known cardiovascular developmental pathways.
• To correlate the presence of this diverticulum with specific congenital heart conditions.

Main Methods:

• Retrospective analysis of imaging studies (e.g., echocardiography, CT angiography) in pediatric patients with congenital heart disease.
• Detailed anatomical description of the brachiocephalic trunk diverticulum and its relationship to adjacent structures.
• Review of embryological literature concerning the development of the aortic arches and ductus arteriosus.

Main Results:

• A diverticulum of the brachiocephalic trunk was identified in six pediatric patients.
• Five patients had unilateral absence of the pulmonary artery.
• One patient had tetralogy of Fallot, and another had Bland-White-Garland syndrome.

Conclusions:

• The described brachiocephalic trunk diverticulum is likely a remnant of the contralateral ductus arteriosus.
• This anomaly may represent the persistent distal portion of the sixth aortic arch.
• The presence of this diverticulum in conjunction with specific CHDs provides insights into early cardiovascular development and potential embryological origins.