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Cirsoid aneurysm is usually met with in the course of the temporal artery, and may involve the greater part of the scalp.

Cirsoid Aneurysm of Forehead 299 70.

Cirsoid Aneurysm of Orbit and Face 300 71.

In other cases they are due to aneurysm of the ophthalmic artery, to thrombosis of the cavernous sinus, and, in rare instances, to cirsoid aneurysm.

Anatomy—Injuries of Arteries: Varieties—Injuries of Veins: Air Embolism—Repair of blood vessels and natural arrest of hæmorrhage—Hæmorrhage: Varieties;Prevention;Arrest—Constitutional effects of hæmorrhage—Hæmophilia—Diseases of Blood Vessels:Thrombosis;Embolism—Arteritis: Varieties;Arterio-sclerosis—Thrombo-phlebitis—Phlebitis: Varieties—Varix—Angiomata—Nævus: Varieties;Electrolysis—Cirsoid aneurysm—Aneurysm: Varieties;Methods of treatment—Aneurysms of Individual Arteries.