R. NICKBRYANMDPATRICIA A.HUDGINSMD
The most widely used classification system for vascular lesions was proposed by Mulliken and Glowacki1 in 1982. It divides such lesions into 2 broad categories: hemangiomas (vascular tumors) and vascular malformations. Hemangiomas usually are not present at birth. They characteristically undergo proliferation followed by involution, and during the proliferative phase they histologically demonstrate endothelial hyperplasia and increased mitotic activity. Vascular malformations, on the other hand, are always present at birth, although they may not be clinically apparent. They do not undergo proliferation or involution, and histologically they consistently demonstrate normal mitotic activity.
Radiology Quiz Case 4: Diagnosis. Arch Otolaryngol Head Neck Surg. 2005;131(11):1030. doi:10.1001/archotol.131.11.1030