Vascular Birthmarks Foundation - An international charitable organization that provides support and informational resources for individuals affected by hemangiomas, port wine stains and other vascular birthmarks and tumors. Also sponsors relevant research. Birthmarks and Hemangiomas InterNETwork Support - Support, resources, and information on medical treatment of birthmarks and hemangiomas. Shine On - Personal, yet informative site offering resources, feedback and support to others dealing with a similar situation. International Society For The Vascular Anomalies - The official site of the International Society for the Study of Vascular Anomalies. The Hemangioma International Treatment Center - Provides comprehensive treatment options to patients affected by hemangiomas and vascular malformations. Find details about vascular birthmarks, treatment options, news and testimonials. Located in Charleston, South Carolina. Sarah's Progress in her Battle with Hemangiomas - Blog is dedicated to couples searching for help for their child diagnosed as having a port wine stain on her face. NHS Choices: Birthmarks (Pigmented) - Provides information on these marks caused by clusters of pigment cells. Includes a short video and description of the different types. Mongolian Spots - DrGreene.com - Read an article that describes spots on the skin that are sometimes mistaken for bruises.