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. 2023 Feb 23;12(5):1805. doi: 10.3390/jcm12051805

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© 2023 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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22-day-old girl (born at gestational age of 25 weeks and 3 days) with US-detected perforated necrotizing enterocolitis without radiographic pneumoperitoneum; this infant survived. (a) An abdominal radiograph obtained 7 h before US shows ileus with elongated loops and no pneumoperitoneum. (b) Preoperative US images show bowel wall thickening (arrow) and free air within the complicated ascites (arrowhead). (c) Preoperative abdominal radiographs obtained 30 min after US show no pneumoperitoneum.