Vascular malformation

Those involving the mix of vessels are known as cerebral arteriovenous malformations (AVMs or cAVMs).

[2] Capillary malformations are limited to the superficial layers of the skin but they can thicken, become nodular, and sometimes become disfiguring.

[5] It has been proposed that the category of capillary malformations, also called vascular stains, be classified into seven major clinical types including nevus flammeus nuchae also known as nevus simplex, commonly known as stork bite or salmon patch.

This disease is linked to the central nervous system (brain, eye, spinal cord).

They are abnormal clusters of closely packed, thin-walled blood vessels that usually form caverns.

[9] Abnormal development of the lymph vessels results in their failure to connect and drain into the venous system.

They can often extend deeper from their surface appearance, reaching underlying muscle or bone.

In the brain a cerebral arteriovenous malformation causes arterial blood to be directly shunted into the veins as there is an absence of a capillary bed.