Origin of the SMA |
| 24882 artery SMA fx normal dx normal angiography Courtesy Ashley Davidoff MD DB |
Polyarteritis Nodosa |
| Occlusive Vascular Disease: Causes of Vascular Occlusion – Polyarteritis Nodosa. This is a medium power photomicrograph from a bowel in a patient with Polyarteritis Nodosa. Bowel is commonly affected in this disorder. The medium sized artery seen here has undergone a deeply eosinophilic (fibrinoid) change. Notice that there is a surrounding inflammatory infiltrate of WBCs and formation of aneurysmal dilatation. This can result in massive hemorrhage if the aneurysm ruptures. colon large bowel artery small bowel fx aneurysm inflammation dx polyarteritis nodosa histopathology Courtesy Barbara Banner MD 12889 |
 
Henoch Schonlein Arteritis Segmental Spasm with Hemorrhage |
| Young female presents with GI bleed hemorrhage bleeding blood small bowel colon SMA superior mesenteric artery jejunal branches ileocolic artery fx arterial spasm fx contrast extravasation RLQ in cecum dx arteritis angiitis vasculitis arteriopathy dx Henoch -Schonlein arteritis angiography angiogram Courtesy Ashley Davidoff MD 28514 28515 28516 28517 surgical specimen showed plaque like ulcers in the bowel consistent with chronic ischemia |
Vasculitis and Spasm |
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This young woman presented with abdominal pain and bleeding. She has a known history of henoch Schonlein purpura. The angiogram shows focal and diffuse areas of vascular spasm (arrows) consistent with a diagnosis of Henoch Schonlein vasculitis. 28517c03.jpg artery SMA vasculitis Henoch Schonlein arteritis Henoch Schonlein purpura preents with GI bleed fx spasm superior mesenteric artery jejunal branches angiogram angiography Courtesy Ashley DAvidoff MD |