Vascular lesions are relatively common abnormalities of the skin and underlying tissues, more commonly known as birthmarks. There are three major categories of vascular lesions: Hemangiomas, Vascular Malformations, and Pyogenic Granulomas. Vascular lesions are relatively common abnormalities of the skin and underlying tissues, more commonly known as birthmarks. There are three major categories of vascular lesions: Hemangiomas, Vascular Malformations, and Pyogenic Granulomas. While these birthmarks can look similar at times, they each vary in terms of origin and necessary treatment. At SSM Health Cardinal Glennon Children’s hospital, the SLUCare Physician Group pediatric plastic surgery team is committed to creating an individualized care plan for vascular lesions that improves the physical and emotional well-being of your child. Hemangiomas are the most common type of vascular lesion in children They are benign, or noncancerous, tumors of the cells that line blood vessels. They usually appear at or shortly after birth as faint areas of pinkish-red discoloration of the skin and then quickly undergo a period of rapid growth. During this time, the lesions enlarge in size and thickness, darken in color and can have problems with ulceration (breakdown of the overlying skin), bleeding and/or infection. The appearance of a hemangioma will vary based on the depth of involvement of the lesion. Superficial hemangiomas appear a bright red color and frequently grow outward on top of the skin surface whereas deeper lesions look more like a bruise on the skin with a soft tissue mass beneath it.