PILTCHER-DA-SILVA, Rodrigo et al. Retroperitoneal fetus in fetu in a 65-year-old man. Clinical and Biomedical Research, [S. l.], v. 42, n. 2, 2022. DOI: 10.22491/2357-9730.121588. Disponível em: https://seer.ufrgs.br/index.php/hcpa/article/view/121588. Acesso em: 22 ago. 2026.