Primary squamous cell carcinoma of the sigmoid colon. Indian Journal of Case Reports, [S. l.], v. 5, n. 5, p. 461–463, 2019. DOI: 10.32677/IJCR.2019.v05.i05.020. Disponível em: https://mansapublishers.com/ijcr/article/view/1819. Acesso em: 5 dec. 2025.