|Print Date:||May 22, 2013, 4:52 pm|
|Title||Superior Mesenteric Artery Dissection, Isolated|
|Text||Spontaneous SMA dissections are exceptional events. During a period of 52 years, only 35 cases (including this one) have been reported. Nevertheless, they represent the most frequent type of digestive artery dissection, with those of the hepatic artery, splenic artery, left gastric artery, and celiac artery being even less frequent.
Patients with SMA dissections are predominantly male (88%) and have an average age of 55 years (between 45 and 87 years). Whereas atherosclerosis, fibromuscular dysplasia, cystic medial necrosis, and connective tissue disorders (Marfanâ€™s, Elhers-Danlos syndromes) are often mentioned as possible causes. In most cases no cause could be found. Other possible etiologies of isolated SMA dissection include iatrogenic or blunt trauma and segmental mediolytic arteriopathy.
Segmental mediolytic ateriopathy is an uncommon nonatherosclerotic and nonvasculitic disease, characterized by lytic degeneration of the arterial media, intramural dissection, and thrombosis or ruptured aneurysm and mainly involves the intraabdominal arterial system. However, a few cases of involvement of intracranial arteries have been reported.
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|Contributor||Alex Sevrukov (University of Illinois College of Medicine)|
|Peer Reviewer||Ernesto Torres M.D. (Civilian Medical Center)|
|Record Number||: 4846|
|Category:||Idiopathic or Unknown|
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