[ case report: a rare anatomical variant of ansa cervicalis]

A rare variant of ansa cervicalis was discovered during routine dissection of the neck in a male cadaver. The superior root of the Ansa cervicalis was formed by the C1 ventral ramus. It fused with the vagus nerve in place of the hypoglossal nerve without any connection and descended into the carotid sheath with it. Then, C1 ventral ramus formed from the sheath and joined the inferior root from C2 and C3 ventral rami. We have reviewed the previous variation reports and reported a rare ansa cervicalis variation