CHORUS
Collaborative Hypertext of Radiology
Small bowel
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ascariasis
- most common parasitic infection in the world
- endemic along Gulf Coast, Ozark Mountains, Nigeria, Southeast Asia
- organism: Ascaris lumbricoides
- age: children (1-10 y.o.)
- cycle: soil -> duodenum -> venules/lymphatics -> lung -> brochus -> mouth -> jejunum
- location:
- jejunum > ileum (99%)
- duodenum, stomach, CBD, pancreatic duct
- symptoms: colic, eosinophilia, appendicitis, hematemesis,
pneumonitis, jaundice
X-ray:
- 15-35 cm long filling defects
- whirled appearance (bolus of worms)
complications:
- intestinal obstruction/perforation
- intermittant biliary obstruction
- liver abscess (rare)
- granulomatous stricture of extrahepatic bile ducts (rare)
Yong H. Hahn, MD - 2 February 1995
Last updated: 1 October 2013
Copyright © 2013, Charles E. Kahn, Jr.
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