Ureter cancer, also known as ureteral cancer or transitional cell carcinoma of the ureter, is a malignant tumour that develops in the ureters—the thin tubes that carry urine from your kidneys to your bladder. This cancer originates from the transitional cells lining the inner wall of the ureters. Ureter cancer may require medical attention due to its potential to spread and affect kidney function. The condition is part of a group called upper tract urothelial cancers, which share similar characteristics with bladder cancer since they arise from the same type of cells.
This represents the most common form of ureter cancer. These tumours develop from transitional cells lining the inner surface of the ureters. They can appear as papillary growths (finger-like projections) or flat lesions and range in aggressiveness.