Imaging Anatomy of the Infrahyoid Neck.

This article explores the anatomy of the infrahyoid neck spaces, which is defined by the layers of the deep cervical fascia, with a focus on their imaging characteristics, contents, and anatomic relationships. A space-based approach to differential diagnosis is presented to aid clinical decision-making and management. The article also addresses common anatomic variants and their clinical relevance to avoid diagnostic errors and surgical complications. In addition, the pathways connecting the infrahyoid neck to the superior mediastinum are discussed, highlighting their importance in the spread of disease and treatment planning.