Definition Hemangioma is a relatively common benign proliferation of blood vessels that primarily develops during childhood.
Clinical features Two main forms of hemangioma are recognized:capillary and cavernous. The capillary formpresents as a flat red area consisting of numerous small capillaries. Cavernous hemangioma appears as an elevated lesion of a deep red color, and consists of large dilated sinuses filled with blood (Fig. 68). A characteristic sign of hemangioma is that the red color disappears on pressure, and returns when the pressure is released.
Laboratory tests Histopathological examination.
Differential diagnosis Pyogenic granuloma, lymphangioma, traumatic hematoma, Kaposi sarcoma, malignant melanoma.