Only eight cases of isolated left common carotid artery have been documented in the literature [2-8] till now.
Though this explains the basic anomaly in our patient, there remains an issue about a small connection that is seen separate from the origin of left common carotid artery from pulmonary artery.
Manner, "Isolated left common carotid artery arising from the main pulmonary artery: where is the ductus arteriosus?
The great vessels in mediastinum include the ascending, the descending, and the arch of aorta, left common carotid artery, left subclavian artery, brachiocephalic trunk, and superior vena cava (SVC).
* Vertebral level of origin of left common carotid artery, left subclavian artery, and brachiocephalic trunk were measured and the findings were as shown in Table 3.
The study on the vertebral levels of origin of left common carotid artery, left subclavian artery, and brachiocephalic trunk was not found in literature, but these levels are important for vascular interventions.
In which the left vertebral artery arise as a third branch of aortic arch between left common carotid (LCC) and left subclavian artery (LSA) and then artery, ascended behind the left common carotid artery while stellate ganglion and ventral rami of cervical spinal nerves were related posteriorly and thoracic duct arched anterior to it before it entered the foramen transversarium of sixth cervical vertebra (figure 1).
In the typical pattern three branches arise from the arch of aorta and they are: brachiocephalic trunk, left common carotid artery and left subclavian artery.
In 6(7%) cases left vertebral artery arising from arch of aorta and in 11(12.9%) cases there was common origin of brachiocephalic trunk and the left common carotid artery.
Out of 70 cadavers, in one cadaver we found four branches arising from the aortic arch, from right to left, (1) Right common carotid artery (2) Left common carotid artery
(3) Left subclavian artery and (4) Aberrant Right subclavian artery.