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In medicine (gastroenterology), angiodysplasia is a small vascular malformation of the gut. It is a common cause of otherwise unexplained gastrointestinal bleeding and anemia. Lesions are often multiple, and frequently involve the cecum or ascending colon, although they can occur at other places.
An arteriovenous malformation (AVM) is an abnormal connection between arteries and veins, bypassing the capillary system. Usually congenital , this vascular anomaly is widely known because of its occurrence in the central nervous system (usually as a cerebral AVM ), but can appear anywhere in the body.
Low-flow malformations involve a single type of blood or lymph vessel, and are known as simple vascular malformations; high-flow malformations involve an artery. There are also malformations that are of mixed-flow involving more than one type of vessel, such as an arteriovenous malformation . [ 2 ]
Arterial malformation ; Arteriovenous fistula (AVF) : a lesion with a direct communication via fistulae between an artery and a vein. [3] Arteriovenous malformation : a lesion with a direct connection between an artery and a vein, without an intervening capillary bed, but with an interposed nidus of dysplastic vascular channels in between. [13]
Arterio refers to the arteries, which are the the blood vessels that take blood away from the heart, and venous refers to the veins, which carry blood toward the heart. Mal- means “badly”, so an arteriovenous malformation, or AVM, is some sort of “bad” or abnormal formation between the arteries and veins.
Arteriovenous malformation, a congenital disorder of the veins and arteries that make up the vascular system Cerebral arteriovenous malformation, an abnormal connection of the veins and arteries in the brain; Autophagic vacuolar myopathy, multiple rare genetic disorders with common histological and pathological features on muscle biopsy
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The treatment for Bonnet–Dechaume–Blanc syndrome is controversial due to a lack of consensus on the different therapeutic procedures for treating arteriovenous malformations. [9] The first successful treatment was performed by Morgan et al., [ 8 ] who combined intracranial resection, ligation of the ophthalmic artery , and selective ...