The football sign is a rare radiographic finding in neonates with NEC, indicating massive pneumoperitoneum. Free air outlines the entire abdominal cavity (arrows), creating a large oval radiolucency in the shape of an American football.
Reproduced from: Football sign. Radiopaedia.org. https://radiopaedia.org/cases/football-sign-1 (Accessed on February 8, 2023). Copyright 2023 Dr Ian Bickle. Image courtesy of Dr Ian Bickle and Radiopaedia.org. Used under license.