A haemangioma is a benign tumour that originates in the blood vessel system. It can appear even in very young children and can be visible on the skin in adults or the elderly. It can be located in various places (face, forehead, nose, eyelid, upper and lower limbs, even the buttocks or perineum). In many cases, it represents a congenital defect.

These lesions may grow singly or in clusters, be visible as separate tumours or merge with each other. On the skin, a haemangioma is visible as a bluish-red or blue-brown lesion, of various shapes, sharply demarcated from the skin and clearly visible. The hemangioma is not visible immediately after birth, as it appears around the 2nd week of life as a red spot on the baby's skin, at which point it starts to grow. It continues to grow until around 6 months of age. Most hemangiomas disappear spontaneously by the age of nine, leaving behind a discolouration of the skin or a cluster of dilated blood vessels.

The vast majority of hemangiomas are benign and do not have a capsule. They grow and infiltrate adjacent tissues, but do not damage or destroy them. How are hemangiomas divided? What types are there?