case_images: PMC9582243_01
case_images: Computed tomography of the current urachal signet ring cell carcinoma case. (A, B) A tumor with the size of 4.0 cm x 2.7 cm x 4.0 cm and progressive annular enhancement was observed in the anterior wall of the bladder. The mass in the trigone of the bladder was confirmed to be a blood clot via cystoscopy. (C) The tumor extended superiorly up to just below the umbilicus.
case_images: fonc-12-1034245-g001.jpg
case_images: PMC9582243_01_fonc-12-1034245-g001.jpg
case_images: f1
case_images: A tumor with the size of 4.0 cm x 2.7 cm x 4.0 cm and progressive annular enhancement was observed in the anterior wall, which extended superiorly up to just below the umbilicus ( Figure 1 ).
case_images: Representative immunohistochemical results of the current urachal signet ring cell carcinoma case.
case_images: fonc-12-1034245-g002.jpg
case_images: PMC9582243_01_fonc-12-1034245-g002.jpg
case_images: f2
case_images: Postoperative pathology showed that the tumor consisted of poorly to moderately differentiated adenocarcinoma, including signet ring cell carcinoma and mucinous adenocarcinoma ( Figure 2 ).
case_images: Treatment timeline of the current urachal signet ring cell carcinoma case.
case_images: fonc-12-1034245-g003.jpg
case_images: PMC9582243_01_fonc-12-1034245-g003.jpg
case_images: f3
case_images: The treatment timeline for this patient is summarized in  Figure 3 .