Hemangiomas

摘要

Infantile hemangiomas (IHs) are nonmalignant growths of vascular endothelial-like cells present in the skin and other organ systems. They are relatively common vascular anomalies seen in approximately 5% to 10% of all infants. Although most IHs are not present at birth, they often develop in the first 2 weeks after birth and tend to grow to their maximum size by 3 to 6 months of age. The physical appearance is that of small, well-demarcated telangiectatic macules or papules. Eighty percent are solitary and may be seen anywhere in the skin but also in the airway, liver, and gastrointestinal tract. The natural history of these lesions is to undergo spontaneous involution at the rate of approximately 10% per year. Approximately 50% of children with untreated hemangiomas have residual changes such as scarring, atrophy, redundant skin, and discoloration.