What is a hemangioma?

A hemangioma is characterized as a benign angioma that consists of a mass of blood vessels. This type of vascular tumor typically appears as a red or purple mark on the skin and is often seen in infants and young children. The growths are generally non-cancerous and can vary in size. Over time, many hemangiomas diminish and may even disappear completely without the need for treatment.

The term "angioma" refers to a tumor made up of blood vessels or lymphatic vessels, and when it is described as benign, it indicates that it does not spread to other parts of the body or pose immediate threat to health, which aligns perfectly with the description provided in the correct answer. This understanding is crucial for distinguishing hemangiomas from malignant tumors, which are cancerous and can lead to severe health concerns.