A large pelvic stone with urothelial carcinoma on the wall of its cyst: a rare case report

Abstract

Abstract Background: The case of a huge pelvic stone with cystic wall urothelial carcinoma is extremely rare. The disease has no specific clinical manifestation, and its formation mechanism is unclear. There is no relevant literature report at present. Case introduction: In this report, a 65-year-old male patient was admitted to our hospital because of frequent urination for more than 5 years and hematuria for half a year. After admission, a cystoscopy was performed and no new organisms were found on the inner wall of the bladder. Computer tomography(CT) showed a high-density shadow mass with a diameter of 61 mm in the pelvic cavity, with soft tissue density at the edge. The cystography results also showed that the high-density mass was located at the back of the bladder, and the inner wall of the bladder was complete. Laparoscopic surgery was performed after the relevant preparations were completed. The whole pelvic mass was removed completely. The inside of the mass was a huge stone with a smooth surface. The pathological examination result of the cyst wall was infiltrating urothelial carcinoma with squamous differentiation. The tumor thrombus was seen in the vein. The stone was cut and analyzed. The results were carbonate apatite and magnesium ammonium phosphate hexahydrate. Follow-up after 3 months showed that the patient was in good condition without urination discomfort. Conclusions: This is an extremely rare case of a high density pelvic stone presenting with cystic mural urothelial carcinoma with a diameter of 61 mm reported in this report. Coupled with the various examinations after admission, leads to speculation that it may have originated from "ectopic bladder" or normal bladder tissue. In the future, this case can serve as a reference for similar cases.