Arteriovenous Hemangioma (Malformation)

 Lacks thick-walled vessels



• Cavernous hemangioma
image Ectatic, thin-walled vessels

• Venous hemangioma

• Venous lake
image Single, dilated, thin-walled vessel

• Angioleiomyoma
image Syncytial proliferation of vascular smooth muscle



image
Low-Power Image of Arteriovenous Hemangioma
Low magnification of a superficial arteriovenous hemangioma shows a tumor that is mostly composed of thick-walled vessels.


image
Arteriovenous Hemangioma in Superficial Dermis
Arteriovenous hemangioma is composed of a circumscribed proliferation of thick-walled muscular vessels that resemble arteries image and thin-walled ectatic veins image.

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Higher Magnification Demonstrating Thin- and Thick-Walled Vessels
Arteriovenous hemangioma is classically composed of a combination of thick- image and thin-walled vessels image. The thick-walled vessels often have degenerative changes resulting in myxoid stroma image surrounding the vessel.

image
Arteriovenous Hemangioma With Focal Thrombi
Fibrin thrombi are sometimes present in the lumina of some of the thick-walled vessels, as shown here image.


TERMINOLOGY


Synonyms




• Cirsoid aneurysm

• Cirsoid hemangioma

• Acral arteriovenous tumor


Definitions




• Benign vascular tumor composed of thick- and thin-walled blood vessels


CLINICAL ISSUES


Epidemiology




• Incidence
image Uncommon lesions

• Age
image Present in adults
– Usually in 5th-6th decades

• Sex
image Women and men affected equally

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Apr 24, 2017 | Posted by in PATHOLOGY & LABORATORY MEDICINE | Comments Off on Arteriovenous Hemangioma (Malformation)

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