WhatsApp

Still Inside the Kidney, or Beyond It? Reading Your Kidney Cancer Stage

Last updated: 15-Oct-2026

Dr Swati Shah, kidney cancer surgeon, Ahmedabad

Dr Swati Shah
MS, DrNB (Surgical Oncology)
Kidney 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

The stage says how far the cancer has gone: its size, whether it has reached the fat or a vein, and any spread to nodes or organs.

Stages I and II are still inside the kidney. Stage III has reached the fat, a large vein or nearby nodes. Stage IV has gone further.

When kidney cancer has spread, a separate risk group, called IMDC, is worked out from six simple checks. It guides the choice of medicine.

The four stages, and the usual plan for each

Kidney cancer is staged with the TNM system. T is the tumour, N the lymph nodes and M spread to distant organs. The stage is first set on the CT scans. It is confirmed after the operation, when the removed tissue is examined.

Kidney cancer stages and the usual plan
StageWhat it meansUsual plan
IConfined to the kidney. Up to 4 cm is T1a, and 4 to 7 cm is T1b.Removing only the tumour (partial nephrectomy) is preferred. A small tumour in a frail person may be watched or treated by ablation.
IILarger than 7 cm, still confined to the kidney.Removing the whole kidney (radical nephrectomy). Partial removal where it is possible.
IIIGrown into the fat around the kidney, into the kidney vein or the main body vein, or into nearby nodes.Radical nephrectomy, with removal of any vein clot. Medicine after surgery is discussed.
IVA T4 tumour, grown beyond the layers around the kidney, or spread to distant organs.Medicines first, with kidney removal or removal of a few deposits for selected people.

Stage I: three ways to deal with a small tumour

For a tumour of 4 cm or less, saving the kidney is the standard. Watching or ablation suits some people. Removing the whole kidney is not done for this size here.

  1. Partial nephrectomy. The tumour is removed and the rest of the kidney stays. Robotic partial nephrectomy is the preferred approach for these tumours.
  2. Active surveillance. For tumours under 2 cm, or for frail people. A CT or MRI is repeated at 3 to 6 months, then every 6 months, then yearly if stable. Treatment starts if it grows more than 5 mm a year, crosses 4 cm, or you prefer to act.
  3. Ablation by heat or freezing. For older or unwell people who cannot have surgery, and some special cases. A biopsy is done first, as a separate step.

When a tumour clot grows into the vein

Some kidney cancers grow a finger of tumour into the kidney vein. It can reach the main vein that carries blood to the heart. The level of this clot is mapped on CT or MRI before surgery. Level I sits in the kidney vein or just enters the main vein. Level II stays below the liver. Level III reaches behind the liver. Level IV goes above the diaphragm, towards the heart. Levels III and IV are planned with heart and blood-vessel surgeons, with the heart-lung machine kept ready. This is never an unplanned operation.

What the microscope adds to the stage

Two tumours of the same stage can behave differently. The histology report adds grade, type and other features that change the follow-up and the advice.

Features in the histology report beyond the stage
FeatureWhat it tells you
Grade (WHO/ISUP).How abnormal the cells look. A higher grade is more aggressive.
Sarcomatoid or rhabdoid change.A major warning sign. It is recorded and acted on.
Tumour necrosis.Dead areas inside the tumour, another sign of more aggressive disease.
Type of kidney cancer.Clear cell, papillary and chromophobe behave differently and respond to different medicines.

The risk of the cancer coming back is then judged with a validated score, such as Leibovich or UISS. It is more accurate than the stage alone. This score also sets how often scans are done after surgery.

Who is offered medicine after surgery?

After a clear cell cancer is fully removed, one medicine has shown a survival benefit. It is pembrolizumab, an immunotherapy given every 3 weeks for about a year. It is offered when the risk of return is raised. That means a stage II tumour of grade 4 or with sarcomatoid change, any stage III or T4 tumour, nodes involved, or spread that was fully removed. Other medicines tried after surgery did not help, so tablets like sunitinib are not offered for this. Pembrolizumab is costly and is rarely covered by insurance in India. It is still offered and discussed openly, with patient-assistance options checked.

Risk groups when the cancer has spread

For stage IV, the IMDC risk group is worked out before the first dose of medicine. It counts six simple factors from your health and blood tests.

  1. Daily activity. Being unable to carry on normal activity or work.
  2. Timing. Less than a year from diagnosis to starting medicine.
  3. Haemoglobin below normal.
  4. Calcium above normal, after correction for albumin.
  5. Neutrophils, a type of white cell, above normal.
  6. Platelets above normal.
IMDC risk groups and what they guide
Factors presentRisk groupWhat it guides
None.Favourable.Immunotherapy combinations are advised. Tablets like sunitinib or pazopanib are also acceptable.
One or two.Intermediate.Immunotherapy combinations. Cabozantinib tablets if immunotherapy cannot be given.
Three or more.Poor.Medicines, not kidney removal. Cabozantinib if immunotherapy cannot be given.

Immunotherapy combinations are out of financial reach for many families here. Tablets such as sunitinib, pazopanib and cabozantinib, including generics, are then the usual first treatment. The guideline option is still offered and the decision is recorded. Removing the kidney is no longer routine in stage IV. It suits people who are fit, in the favourable or lower intermediate group, with little spread, or with a bleeding or painful kidney. A few deposits, especially in the lung, may be removed in a fit patient.

Questions to ask about your stage

  1. Is my stage from the scan, or from the removed tissue?
  2. Is there a clot in the vein, and up to which level?
  3. What are the grade and type, and is there sarcomatoid change?
  4. Do I meet the criteria for medicine after surgery?
  5. If the cancer has spread, what is my IMDC risk group?
  6. How will my other kidney be protected and checked for life?

Frequently asked questions

Is stage I kidney cancer always operated?

Not always. Small tumours in frail people may be watched with scans or treated by ablation. For most fit people, removing only the tumour is preferred.

Can the stage change after the operation?

Yes. The scan gives a first stage. The removed tissue confirms it, and may show fat or vein involvement that scans missed.

What does a tumour clot in the vein mean?

The cancer has grown into the kidney vein or the main body vein. It is stage III, and its level decides how the operation is planned.

What is the IMDC risk group?

It is a score used when kidney cancer has spread. Six health and blood factors sort people into favourable, intermediate or poor groups, which guide medicine choice.

Will I need treatment after surgery?

Most people need regular scans only. Pembrolizumab is offered after clear cell cancer when the risk of return is raised, such as stage III.

Related pages

How the operation is chosen is on the partial or whole kidney removal page. The first signs are on how kidney cancer shows itself. For questions, call +91-63590-11009.

Shah’s Gastro, Cancer & Robotic Surgery Centre

Dr Swati Shah — MS, DrNB (Surgical Oncology) · Kidney 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

Have a CT report or a histology report that gives a stage? Send it ahead on WhatsApp, so the visit starts with it read. What the stage means for your treatment is decided at the consultation, after examination. Call +91-63590-11009 Send your reports before the visit

Rate this post

Get health updates from Dr Swati Shah on WhatsApp

Swasth Parivar: twice a month, practical advice on recovery, diet and warning signs. No advertising. Stop any time.

Your number is used for these updates and for the clinic to reach you. It is never sold or passed on. To stop, reply STOP on WhatsApp.

dr swati shah - uro & gynec cancer surgeon
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.