AUTHOR=Zhang Wenjing , Zhang Li , Liu Haiting TITLE=Necrotizing enterocolitis in a neonate with severe congenital pulmonary valve stenosis complicated by a postoperative right atrial thrombus: a case report JOURNAL=Frontiers in Pediatrics VOLUME=Volume 13 - 2025 YEAR=2025 URL=https://www.frontiersin.org/journals/pediatrics/articles/10.3389/fped.2025.1594899 DOI=10.3389/fped.2025.1594899 ISSN=2296-2360 ABSTRACT=Congenital heart disease may increase the incidence of necrotizing enterocolitis, especially in low-birth-weight infants. We report a case of a newborn with pulmonary valve stenosis who developed neonatal necrotizing enterocolitis IIIB. The infant underwent initial cardiac surgery followed by a laparotomy. After cardiac surgery, a right atrial thrombus was found by cardiac ultrasound. Enterococcus faecium was identified using metagenomic next-generation sequencing of ascitic fluid. The infant received targeted antibiotic therapy and anticoagulant treatment and was then discharged.