Sonographic diagnosis of intestinal anisakiasis presenting as small bowel obstruction

ABSTRACT Background To evaluate the accuracy of ultrasonography (US) in the diagnosis of intestinal anisakiasis presenting as small bowel obstruction. Methods We retrospectively reviewed the clinical features, US examinations, and CT scans of seven patients with intestinal anisakiasis presenting as...

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Bibliographic Details
Published in:Journal of clinical ultrasound 2015-06, Vol.43 (5), p.283-287
Main Authors: Ogata, Masaaki, Tamura, Shuji, Matsunoya, Michiko
Format: Article
Language:English
Subjects:
abdomen
Abdomen, Acute
Aged
Anisakiasis - diagnostic imaging
Diagnosis, Differential
Female
Humans
intestinal anisakiasis
Intestinal Obstruction - diagnostic imaging
Intestinal Obstruction - parasitology
Intestine, Small - diagnostic imaging
Intestine, Small - parasitology
Male
Middle Aged
parasitic infection
Reproducibility of Results
Retrospective Studies
small bowel obstruction
Tomography, X-Ray Computed
Ultrasonic imaging
Ultrasonography
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Summary:ABSTRACT Background To evaluate the accuracy of ultrasonography (US) in the diagnosis of intestinal anisakiasis presenting as small bowel obstruction. Methods We retrospectively reviewed the clinical features, US examinations, and CT scans of seven patients with intestinal anisakiasis presenting as small bowel obstruction. We compared the performances of US and CT in demonstrating peritoneal fluid, small bowel dilatation, and segmental edema of Kerckring's folds. Results All patients presented with a history of ingesting raw saltwater fish or squid less than 2 days prior to presentation at the emergency department and had significant levels of Anisakis‐specific IgE. Both US and CT revealed small bowel obstruction, with dilated small bowel in all patients and accumulations of free peritoneal fluid in six patients. CT showed segmental wall thickening and luminal narrowing with submucosal edema distal to the distended small bowel; US did so in four patients. Conclusions Although US was inferior to CT in demonstrating the segmental intestinal edema causing small bowel obstruction, it can be applied in suspected cases of intestinal anisakiasis presenting as small bowel obstruction, particularly where CT is unavailable or there are concerns about radiation exposure. © 2014 Wiley Periodicals, Inc. J Clin Ultrasound 43:283–287, 2015
ISSN:0091-2751
1097-0096
DOI:10.1002/jcu.22194