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What is ureteral & upper tract cancer?
Ureteral cancer, often grouped with kidney-lining cancer as 'upper tract urothelial cancer,' begins in the lining of the ureters — the two thin tubes that carry urine from each kidney down to the bladder. The same kind of cells line the kidney's collecting system, the ureters, and the bladder, which is why these cancers are closely related to bladder cancer and are treated by the same urology and cancer specialists. The most common warning sign is blood in the urine, which may be visible or found only on a test. Some people also have back or side pain if the tumor blocks the flow of urine. Because these tubes are narrow and deep in the body, treatment usually centers on surgery, and the team carefully checks the bladder as well, since these cancers can appear in more than one spot along the urinary tract. Risk factors include smoking and certain workplace chemical exposures. With early detection and the right treatment, outcomes can be very good.
The main types
Doctors group ureteral & upper tract cancer by where it starts and how it behaves:
| Type | What it means, simply |
|---|---|
| Urothelial carcinoma | By far the most common type — it starts in the lining cells (urothelium) shared by the ureter, kidney drainage system, and bladder. |
| Squamous cell carcinoma | A less common type sometimes linked to long-term irritation or stones in the urinary tract. |
| Low-grade vs. high-grade | Low-grade tumors look more like normal cells and grow slowly; high-grade tumors look more abnormal and are treated more aggressively. |
Staging, in plain terms
Ureteral cancer is staged with the TNM system. T describes how deeply the Tumor has grown into and through the wall of the ureter, N describes whether nearby lymph Nodes contain cancer, and M describes whether the cancer has spread (Metastasized) to distant organs. Because the ureter wall is thin, depth of growth matters a great deal. Doctors combine imaging, a look inside the ureter with a tiny camera (ureteroscopy), and tissue samples to set the stage and plan treatment.
| TNM | What it generally means |
|---|---|
| Stage 0–I | Cancer is in the inner lining or just beneath it, without deep growth — often treated with surgery, and sometimes with kidney-sparing approaches. |
| Stage II | The tumor has grown into the muscle layer of the ureter wall but not beyond it. |
| Stage III | The tumor has grown through the ureter wall into nearby fat or tissue, or into the kidney. |
| Stage IV | The cancer has spread to lymph nodes or to distant organs — treated with medicine, and radiation when helpful to control specific areas. |
The standard of care
Ureteral & Upper Tract Cancer is almost always treated by a team that may include a surgeon, a medical oncologist, and a radiation oncologist, combining therapies for the best result. The usual building blocks are:
Surgery
The main treatment is often removing the affected ureter and kidney together with a cuff of bladder (nephroureterectomy). For small, low-grade tumors, kidney-sparing surgery through a tiny scope may be possible.
Chemotherapy
Drug treatment before or after surgery can lower the chance of return for higher-risk tumors, and it is the main treatment when cancer has spread.
Bladder treatments
Because these cancers can appear in the bladder too, the team monitors the bladder and may place medicine into it to lower the chance of new tumors.
Radiation therapy
Focused radiation is used in selected cases — for example after surgery when the cancer extended beyond the wall, or to control and relieve tumors that cannot be removed.
How radiation treatment works
Radiation uses focused high-energy x-rays to damage the DNA inside cancer cells so they can no longer grow and divide. The ureters run deep in the back of the abdomen, close to the bowel, the remaining kidney, and the spine, so modern image-guided radiation is carefully shaped to concentrate the dose on the tumor area while protecting these neighbors. In ureteral cancer, radiation is not usually the first treatment — surgery and medicine lead — but it has an important supporting role. It can lower the chance of return after surgery when the cancer has grown beyond the wall, and it can relieve symptoms such as pain, bleeding, or blockage from tumors that cannot be removed. Treatments are painless and brief, given over a number of short sessions. Side effects depend on the area treated and are usually temporary, such as fatigue, mild nausea, or loose stools.
The main ways radiation is delivered for ureteral & upper tract cancer:
Adjuvant (post-surgery) radiation
Targeted radiation to the tumor area after surgery can lower the chance of the cancer returning locally in higher-risk cases, planned to protect the bowel and remaining kidney.
Palliative radiation
Precise radiation can relieve pain, bleeding, or blockage caused by a tumor that cannot be removed.
Stereotactic body radiation (SBRT)
Highly focused, high-dose radiation in a few sessions can control a limited number of metastatic spots while sparing nearby organs.
Latest studies shaping care
Care keeps improving — often toward getting the same excellent results with less burden on patients. A few developments:
Chemotherapy after surgery improves outcomes: A major trial showed that giving chemotherapy after removal of upper tract urothelial cancer improved the time patients stayed free of disease, helping make it a standard option for higher-risk tumors.[1]
POUT trial, The Lancet
Kidney-sparing options for low-risk tumors: For small, low-grade tumors, treatments delivered through a thin scope — including a gel that releases medicine inside the ureter — can control disease while preserving the kidney.[2]
OLYMPUS trial; updated urology guidelines
Immunotherapy for advanced disease: Immune-based medicines used in bladder cancer also help selected patients with advanced upper tract urothelial cancer, expanding options beyond chemotherapy.[3]
Urothelial cancer immunotherapy trials
Common questions
Will I lose a kidney? Sometimes the standard surgery removes the affected kidney and ureter together. But for small, low-grade tumors, kidney-sparing approaches through a tiny scope may be possible. Most people live well with one healthy kidney. Your team will explain what fits your case.
Why does my bladder need checking too? The ureter, kidney drainage system, and bladder share the same lining, so these cancers can show up in more than one spot. Regular bladder checks help catch and treat any new tumors early.
Do I need radiation? Not everyone does. Surgery and medicine are the main treatments. Radiation is added in selected cases — for example when the cancer grew beyond the ureter wall, or to relieve symptoms from tumors that cannot be removed.
References
Numbered sources for the studies cited above. Links open the primary publication on PubMed or the publisher’s site.