| • | hemolytic anemia, thrombocytopenia, and coagulopathy |
| • | a complication of rapidly evolving vascular lesions |
| • | these tumors (that have this complication) tend to proliferate for a longer period (two to five years) than classic infantile hemangiomas and have a different histological pattern |
| • | most patients with K-M phenomenon instead have kaposiform hemangioendotheliomas or tufted angiomas canon balls in the dermis |
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