Hemangiomas Vascular Malformations Hemangiomas are classified according to their location. They are deep , superficial or compound . Vascular malformations are classified according to the type of blood vessels involved. Deep hemangiomas occur in lower dermis or subcutaneous tissue below the collagen layer. These usually fade within the first year of life.
Superficial hemangiomas occur in the upper dermis above the collagen layer.
Venular malformations are known as portwine stains, and previously referred to as capillary malformations. The venules of this lesion are located in the superficial layer of the dermis. Compound hemangiomas are a combination of both deep and superficial lesions. Venous malformations are often erroneously referred to as cavernous hemangiomas. They are comprised of large dilated veins in the subcutaneous tissue.