The second type of vascular birthmark is referred to as a vascular malformation. The term “vascular malformation” refers to a collection of birthmarks. Generally speaking, the type of vascular tissue defines the type of birthmark: a proliferation of capillaries defines a capillary malformation, a proliferation of veins defines a venous malformation, a proliferation of lymphatic vessels defines a lymphatic malformation, and so on. Malformations include:
- Nevus Flammeus (aka Angel kiss or Stork bite)
- Capillary Malformation (aka Port Wine Stain)
- Lymphatic malformation
- Venous malformation
- Arterio-venous malformation
Since each malformation is characterized by a different vascular tissue, each malformation has characteristic features.