Hemangiomas and vascular malformations.

Vascular lesions in the neonate and infant are categorized as hemangiomas or malformations. Although their appearances may be similar, the pathobiology, natural history, and prognosis of these lesions are different. Selected important syndromes that are characterized as hemangiomas and vascular malformations are discussed, and an update on what is new in treatment, including laser therapy, is presented.