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Endoscopic evaluation revealed ulcerations and erythema in the ascending colon. The microscopic findings in biopsies included active chronic inflammation with prominent eosinophils and granulomas. A subset of granulomas contained the eggs of Angiostrongylus costaricensis. The definitive method of diagnosing A costaricensis is histology; peripheral blood serology has low specificity and the stool from infected patients does not contain eggs or larvae. Pathologists from endemic regions (Central and South America) are familiar with the typical histologic changes; however, because of increasing global travel, all pathologists should become familiar with A costaricensis, which may mimic common gastrointestinal diseases such as Crohn\u2019s disease, appendicitis, and Meckel\u2019s diverticulum.<\/jats:p>","DOI":"10.1177\/1066896917749929","type":"journal-article","created":{"date-parts":[[2017,12,27]],"date-time":"2017-12-27T02:13:29Z","timestamp":1514340809000},"page":"475-478","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":6,"title":["Abdominal Angiostrongyliasis: A Presentation of Eosinophilic Granulomatous Colitis"],"prefix":"10.1177","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5290-5624","authenticated-orcid":false,"given":"Timothy","family":"Walls","sequence":"first","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"},{"name":"Children\u2019s Health, Children\u2019s Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dominick","family":"Cavuoti","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nandini","family":"Channabasappa","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"},{"name":"Children\u2019s Health, Children\u2019s Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mary","family":"Yang","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"},{"name":"Children\u2019s Health, Children\u2019s Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Paul","family":"Southern","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michelle A.","family":"Gill","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"},{"name":"Children\u2019s Health, Children\u2019s Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3343-4780","authenticated-orcid":false,"given":"Jason Y.","family":"Park","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center, Dallas, TX, USA"},{"name":"Children\u2019s Health, Children\u2019s Medical Center, Dallas, TX, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2017,12,26]]},"reference":[{"key":"bibr1-1066896917749929","doi-asserted-by":"publisher","DOI":"10.1093\/clinids\/14.4.836"},{"key":"bibr2-1066896917749929","doi-asserted-by":"publisher","DOI":"10.1590\/S0074-02762008005000002"},{"key":"bibr3-1066896917749929","doi-asserted-by":"publisher","DOI":"10.4269\/ajtmh.1973.22.613"},{"key":"bibr4-1066896917749929","doi-asserted-by":"publisher","DOI":"10.1128\/CMR.6.1.34"},{"key":"bibr5-1066896917749929","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-7020-3935-5.00111-7"},{"key":"bibr6-1066896917749929","unstructured":"Centre for Disease Control and Prevention. 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