The probability of developing a tumor in the small intestine neocyst

In clinical practice and scientific literature, there is very little data on the occurrence of tumors in the urinary intestinal reservoirs in patients after radical cystectomy with cystoplasty. A characteristic feature of such tumors is a long latent period before the formation of a relapse from 4 to 32 years.The article describes a clinical case of a 1951 patient with a tumor of a small intestinal neocyst. From the patient’s history, there is a long-term hematuria (for 2 years) after radical cystectomy with ileocystoplasty. The intensity of hematuria increased to the formation of profuse with the development of severe anemia. During the examination according to magnetic resonance imaging, computed tomography, ultrasound and invasive diagnostic examinations, no tumor was detected. The patient underwent a diagnostic laparotomy, a tumor was found in the area of ureteral-reservoir anastomosis of the small intestine neocyst. Resection of the small intestine reservoir and ureteral transplantation was performed. The morphological picture of the removed tumor is urothelial cancer of moderate differentiation.Secondary tumors of the small intestinal urinary reservoirs are rare and have the structure of adenocarcinoma. The mechanisms of their occurrence have not been fully studied at the moment. Dynamic monitoring of patients after radical cystectomy and ileocystoplasty should be carried out in a specialized center.