Type B Interrupted Left Aortic Arch with Isolated Right Subclavian Artery

Isolated right subclavian artery with interrupted aortic arch, ventricular septal defect and bilateral patent ductus arteriosus: a rare congenital anomaly

Isolation of the left subclavian artery or its anomalous origin from the pulmonary artery has been documented in several cases, especially in association with a right-sided aortic arch. However, similar anomaly involving the right subclavian artery has been less frequently reported. Isolated right subclavian artery in association with interrupted aortic arch (IAA) is extremely rare, and only three cases have been reported so far. Here, we have presented yet another case of isolated right subclavian artery associated with ventricular septal defect, type B IAA and bilateral patent ductus arteriosus.

Isolated subclavian or brachiocephalic arteries with tetralogy of Fallot, left retro-aortic brachiocephalic vein

BACKGROUND

Isolated subclavian or brachiocephalic artery are uncommon aortic arch anomalies. Here we report the anatomy and histology of this disease.

METHODS

Four cases of congenital isolated subclavian or brachiocephalic artery in fetuses are described.

RESULTS

We identified one case of right aortic arch with isolated left subclavian artery associated with the tetralogy of Fallot, two cases of right aortic arch with isolated left brachiocephalic artery (one case with left retro-aortic brachiocephalic vein), and one case of left aortic arch with isolated right subclavian artery associated with coarctation of the aorta and cervical aortic arch. The proximal subclavian or brachiocephalic artery is arterial duct.

CONCLUSION

Aortic arches with an isolated subclavian or brachiocephalic artery are often associated with the tetralogy of Fallot. It also can be associated with rare abnormalities such as left retro-aortic brachiocephalic vein or cervical aortic arch. Isolated LBA can be associated with microdeletion chromosome 22q11.