What exactly is a vascular mass?

A growth which has e: A vascular mass means a tumor or growth which has excess of blood flowing through it. It may be a benign tumor of blood vessesl commonly called hemangioma or it can be a cancerous growth, many of which has excess of blood flowing through them. You need to find out from the treating doctor what is the cause of this mass/tumor and what is he/she recommending for diagnosis and treatment?