Cirsoid aneurysm

{{Short description|Medical condition}}

A cirsoid aneurysm, also referred to as an arteriovenous malformation{{cite book |title=McKee's Pathology of the Skin |date=2020 |publisher=Elsevier |pages=1698–1894 |edition=5}} is the dilation of a group of blood vessels due to congenital malformations with arterio venous (AV) shunting. "Cirsoid" means resembling a varix.{{cn|date=May 2019}} They are most common on the head or neck.

Cirsoid aneurysms appear as nodules or papules. Histologically, they are composed of both thick- and thin-walled blood vessels.{{cite book |title=Dermatopathology |date=2016 |publisher=Saunders |pages=513–594 |edition=2}}