Duodenal gastrointestinal stromal tumor: case report and importance of ecoendoscopy . Research, Society and Development, [S. l.], v. 10, n. 11, p. e124101119407, 2021. DOI: 10.33448/rsd-v10i11.19407. Disponível em: https://rsdjournal.org/rsd/article/view/19407. Acesso em: 5 dec. 2025.