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Updated: Jul 15, 2026

Comparison of Predictive Performance of Three Lymph Node Staging Systems in Colorectal Signet Ring Cell Carcinoma Based on Machine Learning Model
Published on: April 18, 2025
Urachal signet ring cell carcinoma
Akihiro Morii1, Yuzo Furuya, Yasuyoshi Fujiuchi
1Department of Urology, Faculty of Medicine, University of Toyama, Toyama, Japan. amorii@med.u.toyama.ac.jp
Abstract:
Urachal adenocarcinoma is a rare neoplasm associated with poor prognosis. We report a case of urachal signet ring cell carcinoma in a 65-year-old man. He was admitted with a chief complaint of microscopic hematuria. Cystoscopic examination and transurethral biopsy showed an urachal tumor. After undergoing radical cystectomy and intravenous chemotherapy, the patient developed bilateral hydronephroses as a result of bilateral ureteral metastases and bowel obstraction because of the Para-aortic lymphnode metastasis. He has been alive for 5 years after three courses of chemotherapy and a bypass operation.
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