American Board of Surgery Qualifying Exam (ABS QE) Practice Test

Zone 2 of the neck is clinically significant and encompasses the region between the lower edge of the mandible and the level of the cricoid cartilage. This area contains critical vascular structures and is typically involved in trauma assessments.

The common carotid artery (CCA) is located in this zone and serves as a major blood vessel supplying oxygenated blood to the head and neck. The presence of the CCA in Zone 2 is essential for understanding the anatomy of the neck and the potential risks associated with injuries in this area.

Other structures found in Zone 2 include the internal jugular vein, portions of the cervical sympathetic chain, and the vagus nerve, but not the common carotid artery. The importance of recognizing the CCA's path in this zone lies in its proximity to various critical structures and its implications in surgical procedures and trauma management.

In contrast, the vertebral artery is situated posteriorly and is typically not categorized within Zone 2, while the jugular artery is not commonly referenced in this anatomical delineation, as the internal jugular vein is more relevant. The esophagus is located more posteriorly and does not primarily inhabit Zone 2, but rather lies more within Zone 3.

Understanding these anatomical relationships is crucial for surgical