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Ureteral cancer is a rare type of cancer that develops in one of the ureters, the narrow tubes that carry urine from the kidneys to the bladder. It can affect how urine flows through the urinary system and may cause symptoms such as blood in the urine or pain in the side.

Because some symptoms can also occur with kidney stones or urinary infections, ureteral cancer may not be easy to recognize at first. Understanding its warning signs and risk factors can help people know when to seek medical advice.

What Is Ureteral Cancer?

Ureteral cancer develops when abnormal cells grow uncontrollably in the lining of a ureter. Most cases are a type called urothelial carcinoma, which begins in the cells lining parts of the urinary tract.

The ureters connect the kidneys to the bladder. If a tumor grows inside a ureter, it may partly block the flow of urine. In some cases, the cancer can spread to nearby tissues or other parts of the body.

What Are the Warning Signs of Ureteral Cancer?

In its early stages, ureteral cancer may cause few or no noticeable symptoms. When symptoms occur, they may include:

• Blood in the urine, which may make it look pink, red, or brown

• Pain in the side or back

• Pain or burning during urination

• Frequent urination

• Unexplained tiredness

• Unintentional weight loss

• Repeated urinary tract problems

• Reduced urine flow if the ureter becomes blocked

Blood in the urine is an important warning sign that should be checked, even if it appears only once or does not cause pain.

These symptoms do not automatically mean cancer. Kidney stones, infections, and other conditions can cause similar problems, so proper medical evaluation is important.

What Are the Risk Factors for Ureteral Cancer?

Several factors may increase the risk of developing ureteral cancer.

Smoking

Smoking is an important risk factor for urothelial cancers. Harmful chemicals from tobacco can enter the bloodstream and eventually be removed through urine, exposing the urinary tract to substances that may damage cells.

Increasing Age

Ureteral cancer is more common in older adults, although it can occur at other ages.

Previous Bladder Cancer

People who have had bladder cancer may have a higher risk of developing cancer elsewhere in the urinary tract because similar types of cells line these areas.

Certain Chemical Exposures

Long-term exposure to some industrial chemicals, particularly certain aromatic amines, has been linked to urothelial cancers.

Long-Term Kidney or Urinary Problems

Some uncommon medical conditions involving long-term irritation or damage to the upper urinary tract may increase risk. The level of risk depends on the condition.

Having a risk factor does not mean a person will definitely develop ureteral cancer. Some people develop it without any known risk factors.

How Is Ureteral Cancer Diagnosed?

Doctors may recommend several tests to find the cause of symptoms and check for cancer.

Urine tests: A urine sample may be checked for blood or abnormal cells.

Imaging tests: CT urography or other imaging tests can help doctors examine the kidneys, ureters, and bladder for unusual growths or blockages.

Ureteroscopy: A thin instrument with a camera is passed through the urinary tract to examine the inside of the ureter.

Biopsy: If an abnormal area is found, a small tissue sample may be collected and examined in a laboratory to check for cancer.

The results help doctors understand the type of tumor and whether further tests are needed to determine its stage.

How Is Ureteral Cancer Treated?

Treatment depends on the tumor's size, location, stage, and the person's overall health.

Some smaller, low-risk tumors may be treated with procedures that remove or destroy the abnormal tissue while preserving the kidney and ureter when possible.

More advanced disease may require surgery to remove the affected kidney, ureter, and part of the bladder where the ureter connects. Chemotherapy or other medicines may also be recommended depending on the cancer's characteristics.

A urology and cancer care team can explain the most suitable options for each patient.

Can Ureteral Cancer Be Prevented?

There is no guaranteed way to prevent ureteral cancer, but avoiding tobacco is an important step toward lowering the risk of urinary tract cancers.

Reducing exposure to harmful workplace chemicals by following safety procedures may also help.

People with a history of urinary tract cancer should follow their doctor's recommended monitoring plan.

When Should You See a Doctor?

Seek medical advice if you notice blood in your urine, persistent pain in your side or back, or ongoing urinary problems.

Blood in the urine should not be ignored, even when there is no pain. A doctor can determine whether the cause is an infection, kidney stone, or another condition that requires treatment.

FAQs

Is ureteral cancer common?

No. Ureteral cancer is rare compared with bladder cancer and many other cancers.

Does blood in the urine always mean cancer?

No. Blood in the urine can result from infections, kidney stones, or other conditions. However, it should always be medically evaluated.

Can ureteral cancer affect kidney function?

Yes. A tumor may block the flow of urine from a kidney and affect its function if the blockage is significant or lasts a long time.

Is ureteral cancer treatable?

Yes. Treatment is available, and options depend on the stage, location, and risk level of the tumor. Early diagnosis may provide more treatment choices.

Can ureteral cancer return after treatment?

Yes. Urothelial cancer can sometimes return in the urinary tract, so follow-up tests and medical appointments are important.

Conclusion

Ureteral cancer develops in the tubes that carry urine from the kidneys to the bladder. Blood in the urine, side pain, and changes in urination can be warning signs, although other conditions can cause similar symptoms.

Smoking, older age, previous bladder cancer, and certain chemical exposures can increase risk. Recognizing unusual symptoms and getting them checked early can help doctors identify the cause and recommend appropriate treatment.