Patterns of Infantile Hemangiomas: New Clues to Hemangioma Pathogenesis and Embryonic Facial Development

Abstract
OBJECTIVES. Large facial infantile hemangiomas have higher rates of complications than small localized hemangiomas, more often require treatment, and can be associated with neurological, ophthalmologic, and cardiac anomalies (PHACE syndrome). The anatomic patterns of these hemangiomas are often referred to as “segmental” despite a lack of precise anatomic definitions. Our study aims to define “segmental” hemangiomas based on clinically observed patterns. Our secondary goal is to relate the observed patterns to currently accepted developmental patterns to gain insight into hemangioma pathogenesis and craniofacial development.

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