Vascular anomalies can be classified in two different classifications: malformations or tumours. They are often confused, especially at the time of diagnosis.
Vascular malformations occur because of an error in the development of vascular embryogenic tissue, meaning amongst other things, that they are present at the time of birth. Vascular tumours appear after the birth of the patient (except congenital hemangiomas), a period that can vary from a few weeks to several months or many years.
Here, we will describe tumours and malformations as different entities, focusing our attention on vascular tumours.