Purpose:
Vascular anomalies of the head and neck are frequently misdiagnosed, which detrimentally impacts their evaluation and management. This is particularly related to considerable inconsistency in their nomenclature, as classification schemes constantly evolve with the recognition of new diseases and improved understanding of the histopathogenesis and genetic basis of known entities. The updated 2014 classification of the International Society for The Study of Vascular Anomalies (ISSVA) is the new consensus classification for vascular anomalies. It insures consistent communication, which is crucial in this patient population, often requiring multidisciplinary management. We present an overview of the imaging characteristics of the different types of vascular anomalies of the head and neck according to the new ISSVA classification. 

Methods: 
We reviewed the records of our multidisciplinary clinic for vascular anomalies and selected different imaging studies including CT, MRI and angiograms when appropriate, of patients with various vascular lesions of the head and neck. These encompass the most common vascular tumors, in particular the infantile hemangioma and congenital hemangioma, as well as various vascular malformations comprising venous malformations, lymphatic malformations, mixed venolymphatic malformations, arteriovenous malformations and arteriovenous fistulas. 

Findings:
The distinctive imaging features of each vascular anomaly are highlighted, including its morphology, signal characteristics, enhancement pattern, vascularity as well as additional hallmarks such as the presence of phleboliths or fluid-fluid levels. We emphasize the importance of adhering to the ISSVA classification for adequate classification, diagnosis and management of these lesions.  

Summary:
The updated ISSVA classification should be universally adopted to ensure accurate diagnosis and management of vascular anomalies of the head and neck.

Classification of Vascular Anomalies by The International Society for The Study of Vascular Anomalies (ISSVA): An Overview in The Head and Neck

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