Vascular lesions of the orbit in children.

Hemangioma and venous lymphatic malformation are the two most common orbital vascular lesions occurring in the pediatric patient. MR imaging precisely delineates and characterizes these lesions and thus plays an important role in their diagnosis and management. This article discusses the characteristic clinical and imaging findings of hemangiomas and venous lymphatic malformations and the controversies regarding the origin and nomenclature of vascular lesions.