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Cancer in the Ureter or the Kidney's Drainage Lining: Which Signs Should Not Be Explained Away?

Last updated: 15-Oct-2026

Dr Swati Shah, urology cancer surgeon, Ahmedabad

Dr Swati Shah
MS, DrNB (Surgical Oncology)
Urology Cancer Surgeon
Apollo Hospital, Bhat, Gandhinagar · Gota OPD, Ahmedabad · 18 years of experience
★★★★★ 4.99 from 84 Google reviews (Gota clinic) · 5.0 from 35 (Apollo, Bhat)

IN SHORT

This cancer grows in the thin lining that carries urine out of the kidney and down the ureter. It is different from the common kidney cancer.

Blood in the urine without pain is its commonest first sign. It is often put down to a stone or an infection and missed for months.

Blood in the urine needs both kidneys, both ureters and the bladder checked. A CT urogram and a cystoscopy are the first key tests.

Where this cancer starts

Urine is made in the kidney. It collects in a funnel inside the kidney called the renal pelvis. From there, a thin tube called the ureter carries it down to the bladder. All of these spaces share one lining, called the urothelium. Cancer of this lining in the kidney or the ureter is called upper tract urothelial cancer.

It is not the same disease as the common kidney cancer, which starts in the kidney’s solid tissue. The signs overlap, but the tests and the treatment differ. The lining of the bladder is the same lining. So the bladder is never assumed to be clear, and it is always looked at too.

The signs to take seriously

Most people notice blood in the urine. A few have side pain. Some have no symptom at all, and the clue comes from a urine test or a scan.

Signs that point to the upper urinary tract
SignWhat it can meanWhat is checked next
Blood in the urine without pain.The commonest first sign of this cancer.A CT urogram and a cystoscopy.
A dull ache in the side or back.A tumour blocking the flow of urine.A CT urogram.
Sharp, colicky side pain.Blood clots passing down the ureter.A CT urogram, before calling it a stone.
Abnormal cells in a urine test, with a normal bladder.A source higher up in the kidney or ureter.The upper tract is examined before saying no cause was found.
A swollen kidney or a filling gap on a scan.Something blocking or lining the drainage system.A CT urogram with the late urine phase.

Why it is so often missed

Stones and urine infections are common, so blood in the urine is easily blamed on them. When the bleeding stops on its own, the search often stops too.

A stone that is never actually seen on a scan is not an answer. Nor is an infection that does not show in the urine culture. If blood has been seen even once, the whole urinary tract needs to be checked. That means both kidneys, both ureters and the bladder. A delay of months is the usual story in this cancer, and it is avoidable.

Who is at higher risk

  1. People who smoke, or used to smoke. Smoking is the main risk that a person can change.
  2. People who have had bladder cancer before. The same lining can grow a new tumour higher up.
  3. Families with Lynch syndrome cancers: bowel, womb, stomach, ovary or small bowel cancer.
  4. People who have worked with certain industrial chemicals called aromatic amines.
  5. People exposed to a substance called aristolochic acid.

Three questions are asked at diagnosis to screen for Lynch syndrome. Are you under 60? Have you had a Lynch-type cancer yourself? Has a parent, brother, sister or child had one? A yes to any of them leads to more testing. The tumour itself is also tested for Lynch-type changes.

The first tests, in order

  1. CT urogram. A contrast CT scan with a late phase that shows urine filling the drainage system. It shows where the tumour sits, its size, and whether it blocks the kidney.
  2. Cystoscopy. A thin camera looks inside the bladder, in every patient. A bladder tumour must be ruled out before any treatment higher up.
  3. Urine cytology. Urine is checked for cancer cells. Sometimes urine is collected straight from the affected ureter.
  4. Blood tests and kidney function. The kidney function number, called eGFR, is written down clearly. It matters for chemotherapy later.
  5. A kidney scan for each side’s share of function. This is done if the other kidney seems weak.
  6. CT scan of the chest. This is done when the tumour looks high-risk.

When a camera test of the ureter is used

A thin camera passed up the ureter, called ureteroscopy, can take a biopsy. It is not done for everyone, because it can raise the chance of a later bladder tumour.

It is needed when keeping the kidney is being considered, or when the diagnosis is truly unclear. If the CT urogram and high-grade urine cells already show a high-risk tumour, it is skipped. In that case it adds risk without changing the plan.

Signs that need help the same day

Go to hospital the same day for these
What you noticeWhy it is urgent
Fever with chills and side pain, with a known block in the kidney.Infection behind a block needs drainage first, usually with a tube through the back.
Heavy bleeding with clots, and you cannot pass urine.Clots are blocking the bladder outlet and need urgent care.

Low risk or high risk

Once the tests are done, the tumour is placed in a low-risk or a high-risk group. This group decides the treatment, which is explained on the nephroureterectomy page.

What puts a tumour in each group
Low risk: all of theseHigh risk: any of these
A single tumour.More than one tumour.
Smaller than 2 cm.2 cm or larger.
Low-grade cells in urine and biopsy.High-grade cells in urine or biopsy.
No sign of growth into the wall on CT.Growth into the wall, a swollen kidney, or a rare cell type on testing.

Frequently asked questions

Is blood in the urine without pain always cancer?

No. Stones, infection and other causes are more common. But it always needs the kidneys, ureters and bladder checked, because cancer cannot be ruled out without tests.

The bleeding stopped by itself. Do I still need tests?

Yes. Bleeding from this cancer often comes and goes. Stopping on its own does not mean the cause has gone.

Is this the same as kidney cancer?

No. Common kidney cancer starts in the solid kidney tissue. This cancer starts in the lining that drains urine, the same lining as the bladder.

Why is a bladder camera test needed if the problem is in the kidney?

The bladder has the same lining and can carry a tumour at the same time. It is checked in every patient before any treatment.

Does a family history of bowel or womb cancer matter here?

It can. These cancers belong to Lynch syndrome, which also raises the risk of this cancer. Tell the doctor about every cancer in the family.

Related pages

Treatment for this cancer is explained on the nephroureterectomy page. For questions before you travel, call +91-63590-11009.

Shah’s Gastro, Cancer & Robotic Surgery Centre

Dr Swati Shah — MS, DrNB (Surgical Oncology) · Urology Cancer Surgeon

Consultation: Gota OPD, Gota, Ahmedabad. Surgery: Apollo Hospital, Bhat, Gandhinagar.

Gota OPD — Gota, Ahmedabad, Gujarat

Apollo Hospital, Bhat, Gandhinagar — Apollo Hospital International Limited, Plot No. 1 A, GIDC Bhat Industrial Estate, Bhat, Gandhinagar, Gujarat

Call: +91-63590-11009 · WhatsApp: +91-63590-11009

Blood in the urine, or a scan showing a swollen kidney or a block in the ureter? The urine reports, scan films and reports can be sent ahead on WhatsApp, so the visit starts with them already read. What they mean for you is decided at the consultation, after examination. Call +91-63590-11009 Send reports before your visit

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