[13] Inside a tumor which include infantile hemangioma the mass is comfortable, and simply compressed, as well as their coloring is due to the dilated anomalous included veins.[fourteen] These are mostly found in the head and neck. Venous malformations are the kind of vascular malformation that involves the veins. Injury. Injuries https://www.sgvascularctr.com/all-things-vascular-singapore-guide/