Where have I lost my appendix? An unusual finding of acute appendicitis within an irreducible umbilical hernia sac. Case report.: Acute appendicitis in an umbilical hernia. Acta Biomed [Internet]. 2024 Jun. 21 [cited 2024 Jun. 30];95(3):e2024049. Available from: https://mattioli1885journals.com/index.php/actabiomedica/article/view/14598