SHM Converge Scientific Abstract ePoster Gallery-No Surgery for Small Intestinal Anisakiasis: Findings of 21 Cases.

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This hospital reported 21 cases of intestinal anisakiasis from January 2013 to December 2023, emphasizing that the condition can often be diagnosed and treated without surgery. All patients had eaten raw fish before symptom onset. Common seafood exposures included bonito, sardine, squid, mackerel, salmon, pacific saury, tuna, and shrimp.<br /><br />All 21 patients had abdominal pain, and most also had nausea. Less common symptoms included vomiting, diarrhea, and fever. Symptoms typically began within 2–3 days after raw fish ingestion. Diagnosis was made by endoscopy in 2 cases, by specific IgE or IgA testing in 9 cases, and by clinical history plus CT findings in 10 cases.<br /><br />CT findings were highly consistent: bowel wall thickening and mesenteric fat stranding were each seen in 95.2% of cases, ascites in 90.5%, wall stratification in 90.4%, and intestinal dilation in 85.7%. Intestinal obstruction occurred in one-third of patients, while a whirl sign was absent in all cases.<br /><br />All patients received conservative treatment, and none required surgery, were readmitted, or died. Hospital stays were generally short, usually under one week.<br /><br />The authors conclude that intestinal anisakiasis should be suspected in patients with recent raw fish consumption, acute abdominal pain, and characteristic CT findings. Recognizing these clues may prevent unnecessary surgical intervention.

Asset Subtitle

Sayaka Aoyama

Meta Tag

Author List Irie Toshiyuki, Junya Kashimura, Sayaka Aoyama

Category Clinical Vignettes

Concept Small Intestinal Anisakiasis

Concept Raw Fish Consumption

Concept Abdominal Pain

Concept Bowel Wall Thickening

Concept Observation

Distinguished Non-Finalist

Presenter Organization Department of Internal Medicine, Mito Kyodo General Hospital, University of Tsukuba

Presenting Author Sayaka Aoyama

Track Adult

Keywords

intestinal anisakiasis

raw fish consumption

abdominal pain

computed tomography

bowel wall thickening

mesenteric fat stranding

ascites

endoscopy

conservative treatment

surgical avoidance

Small Intestinal Anisakiasis

Raw Fish Consumption

Abdominal Pain

Bowel Wall Thickening

Observation