Infantile haemangioma: a complicated disease.

Infantile haemangiomas (IH) are common benign vascular tumors of childhood. They are characterised by rapid growth during the first year of life and slow regression that is usually completed by 7-10 years of age. The underlying mechanism of action of IH is aberrant angiogenesis and vasculogenesis, and involves the mammalian target of rapamycin pathway and vascular endothelial growth factor pathway. IH become a challenge if they are part of a syndrome, are located in certain areas of the body, or if complications develop. The beta-adrenergic receptor blocker propranolol is a promising new candidate for first-line systemic therapy. This review focuses on the clinical characteristics, pathogenesis and management of IH.