DefinePK

Abstract

Vascular malformations are congenital lesions and distinct from vascular tumors. They are composed of abnormally formed channels lined by endothelial cells.1 Their growth pattern is different from that of vascular tumors and both are types of vascular anomalies. Historically, there was controversy about the nomenclature used for these anomalies. However, the classification system proposed by the International Society for the Study of Vascular Anomalies (ISSVA), which is the most widely accepted system, tried to address these issues. According to it the vascular anomalies are categorized as vascular tumors and vascular malformations.2 The original classification of ISSVA of 1996 was been revised in 2014 and later in 2018 keeping abreast with the new knowledge gathered over the decades.3,4 ……………….