Tumors of the pelvis and ureter

Tumors of the renal pelvis and ureter are most common in transitional cell carcinoma, and their etiology, pathology, clinical manifestations, and treatment principles are similar to bladder tumors. The incidence of renal pelvic transitional cell tumors in China is higher than reported abroad. Renal pelvis cancer generally accounts for less than 10% of kidney tumors, and the statistics of the 3rd National Urological Association of China account for 24%. Tumors of the urothelial organs have different chances of developing tumors. Bladder tumors are the most common, and other organs are rare. There are more urothelial tumors reported in China than abroad. The carcinogens exposed to urinary epithelial organ tumors are the same. Urinary epithelial tumors have a tendency to develop in multiple organs and often occur in the direction of urinary flow. The first clinical hospital of Beijing Medical University accounts for 92%, and the incidence of reverse urinary flow only accounts for 92%. 8%. The literature reports that bladder cancer occurs after 30% to 50% of upper urinary tract tumors, and the chance of bladder cancer for upper urinary tract tumors is 2% to 3%. The bladder has a large capacity in the urinary organs, long urine retention time, and hydrolytic enzymes activate carcinogens, so its chance of tumor formation is much higher than other organs. 10% of bladder cancer resected specimens have carcinoma in situ at the end of the ureter. Therefore, it is conceivable that if bladder cancer patients live longer, more cases of upper urinary tract cancer may be found.

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