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Staging Guide · Reviewed by CION Oncologists · NABH Accredited
FIGO Staging of Cervical Cancer — How Your Stage Is Decided
The stage is the single number that shapes everything that follows — whether treatment starts with surgery or with radiation, how long it lasts, and what the follow-up looks like. Cervical cancer is staged with the FIGO system, named after the International Federation of Gynecology and Obstetrics, and revised in 2018 in a way that changed how the stage is worked out. This page sets out every stage from IA to IVB in ordinary language: what is being measured, which thresholds matter, who decides, and what each stage generally means for treatment. Read it before your next appointment so the conversation starts from what you want to ask, not from the vocabulary.
- Four stages, twelve substages — and the substage is often what actually changes the plan
- Since 2018, scans count — imaging and pathology can be used to assign the stage
- Lymph nodes are part of the stage — stage IIIC exists for exactly that reason
- The stage is a team decision — agreed at a tumour board, not by one clinician alone
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What Staging Is Trying to Answer
A stage is a shorthand for one question: how far has the cancer travelled from where it began? It is not a measure of how aggressive the cells look, how ill you feel, or how long anyone expects treatment to take. Those are separate questions with separate answers. Staging exists so that a woman treated in Hyderabad, in Delhi or in any hospital anywhere in the world is described in the same language, treated against the same evidence, and counted in the same statistics.
Cervical cancer uses the FIGO system rather than the TNM system familiar from other cancers. In practice the two run in parallel — your pathology report may carry a TNM description alongside the FIGO stage — but FIGO is the one that drives treatment decisions and appears in the guidelines.
The system was substantially revised in 2018, and the revision matters to anyone being staged today. Before it, the official stage was assigned on clinical examination alone. A woman whose scan showed involved lymph nodes was still recorded at whatever stage the examining hand could feel. The 2018 version permits imaging and pathology findings to be used, and it created a new stage — IIIC — for disease that has reached the lymph nodes. Reports frequently mark which evidence was used with a small letter: r when the stage came from imaging, p when it came from a pathology specimen.
Did You Know? Stage at presentation is the single biggest difference between cervical cancer outcomes in India and in countries with mature screening programmes. Registry data collated by ICMR-NCDIR under the National Cancer Registry Programme has consistently shown that a large share of Indian women are diagnosed only once the disease is locally advanced — not because treatment is unavailable, but because screening reached them late or not at all. The stage in your report is a description of when the cancer was found, not a judgement about you. Sources: ICMR-NCDIR National Cancer Registry Programme; WHO Global Strategy for Cervical Cancer Elimination.
The Four Inputs Your Stage Is Built From
No single test produces a stage. Four sources of evidence are assembled, and a tumour board turns them into one number.
Input 1
Clinical Examination
The cervix, vagina and the tissue on either side of the cervix are examined, sometimes under anaesthesia so the assessment is thorough and comfortable. This is where involvement of the vaginal walls and the pelvic side wall is judged directly.
Input 2
The Pathology Report
The biopsy or excision specimen gives the cell type, the grade, and — crucially for stage I — the measured depth of invasion in millimetres. Stage IA is defined microscopically and cannot be assigned from a scan.
Input 3
Pelvic MRI
The staging MRI measures the tumour, shows whether the cervical wall is breached, and answers the parametrium question — the finding that separates stage IIA from IIB.
Input 4
PET-CT or Cross-Sectional Imaging
Nodes and distant sites. A PET-CT is how stage IIIC is usually established without surgery, and how disease outside the pelvis is ruled in or out.
Sometimes
Direct Inspection of Bladder or Rectum
Where imaging raises the question of stage IVA, the lining of the bladder or rectum is inspected and biopsied. Swelling of the bladder lining alone is not enough — the tumour must have invaded it.
The decision
The Tumour Board
Surgery, radiation and medical oncology review the evidence together and agree the stage and the plan. Both NCCN and ESMO guidance place this multidisciplinary review at the centre of cervical cancer care.
If you have been given a stage without an MRI, it is reasonable to ask whether the work-up is complete — particularly before agreeing to surgery.
Every FIGO Stage, in Plain Language
This is the FIGO 2018 system as it is used today. Find the label written on your report in the first column.
| Stage | What it means | Treatment usually built around |
|---|---|---|
| IA1 | Invasion visible only under the microscope, less than 3 mm deep | A cone excision or simple hysterectomy; fertility can often be preserved |
| IA2 | Microscopic invasion of 3 mm up to 5 mm deep | Surgery with assessment of the pelvic lymph nodes |
| IB1 | Invasion 5 mm or deeper, tumour under 2 cm across | Radical surgery with node assessment; fertility-sparing options exist |
| IB2 | Tumour 2 cm up to 4 cm, still confined to the cervix | Radical surgery, or radiation with chemotherapy |
| IB3 | Tumour 4 cm or larger, still confined to the cervix | Usually radiation with chemotherapy, completed with brachytherapy |
| IIA1 / IIA2 | Spread to the upper two-thirds of the vagina without parametrial involvement — under 4 cm, or 4 cm and above | Surgery in selected smaller tumours; otherwise chemoradiation |
| IIB | Spread into the parametrium, the tissue beside the cervix | Chemoradiation with brachytherapy rather than surgery |
| IIIA | Involves the lower third of the vagina, but not the pelvic wall | Chemoradiation with brachytherapy |
| IIIB | Reaches the pelvic side wall, or blocks a ureter causing a swollen kidney | Chemoradiation, sometimes after relieving the obstruction first |
| IIIC1 | Pelvic lymph nodes involved, whatever the size of the tumour | Chemoradiation with the field covering the involved nodes |
| IIIC2 | Para-aortic lymph nodes involved, higher in the abdomen | Chemoradiation over an extended field |
| IVA | Grown into the lining of the bladder or rectum | Chemoradiation; surgery only in carefully selected cases |
| IVB | Spread to distant organs such as lungs, liver, bone or distant nodes | Systemic treatment, with radiation used to control specific sites |
Two thresholds do most of the work in stage I: 2 cm and 4 cm. Below 2 cm, fertility-sparing surgery is most often possible. At 4 cm and above, the plan usually moves away from surgery and towards radiation with chemotherapy, because operating on a large tumour tends to end with radiation being needed afterwards anyway — and having both increases side effects without improving control. Read what each stage means day to day on stage 1, stage 2, stage 3 and stage 4.
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What the Stage Decides — and What It Does Not
The stage sets the shape of the treatment: broadly, disease confined to the cervix and under 4 cm is a surgical question, while larger tumours and anything that has spread beyond the cervix are treated with radiation given alongside platinum-based chemotherapy and completed with brachytherapy. Disease that has reached distant organs is treated systemically. That much follows from the number.
A good deal does not follow from it. Several other findings sit alongside the stage and can change the recommendation within it:
- Cell type. Squamous, adenocarcinoma and the rarer subtypes are staged identically, but one subtype — small cell or neuroendocrine — has a genuinely different treatment pathway regardless of stage.
- Lymphovascular invasion. Whether tumour cells are seen inside small vessels in the specimen. It does not change the stage, but it does influence whether radiation is advised after surgery.
- Surgical margins and node findings. What the operative specimen shows after a radical hysterectomy determines whether further treatment is recommended, even when the stage is unchanged.
- Your age, fitness and kidney function. These shape what can be delivered safely, particularly the chemotherapy component and the length of an extended radiation field.
- Whether you want children. Fertility-sparing approaches exist for carefully selected early-stage disease, but they must be raised before treatment starts. Ask at the first consultation, not the third.
Which modality is used, in what order, and what each involves in practice is set out on our cervical cancer treatment in Hyderabad page. For how the disease fits together as a whole — causes, symptoms, screening and treatment — start at the cervical cancer overview.
Five Things About Staging That Are Easy to Misread
Stage is not grade
Stage describes how far the cancer has spread. Grade — reported as 1, 2 or 3 — describes how abnormal the cells look under the microscope. A small tumour can be high grade and a large one low grade. They are recorded separately because they tell you different things.
The stage does not change as you go along
The stage assigned at diagnosis is the one that stays in your record. If the cancer shrinks with treatment, you are not restaged downwards; if it returns years later, that is described as recurrence rather than a new higher stage. This is a convention that keeps outcomes comparable, and it is why a good response does not show up as a different number.
A higher number is not a shorter time
Stage is a description of anatomy, not a prediction about any individual. Outcomes vary widely within every stage according to the cell type, the response to treatment, and how completely the treatment is delivered. No honest oncologist reads a lifespan off a stage, and you should be wary of any website that does.
Stage IIIC can come with a small tumour
Because node involvement now defines stage IIIC on its own, a woman with a modest tumour and one active pelvic node is stage IIIC1 — the same label as someone with far more extensive local disease. This causes real distress when it is not explained. The letters after the number matter enormously here.
Bullous oedema is not stage IVA
Swelling of the bladder lining seen at inspection is not the same as the tumour invading it. FIGO is explicit that oedema alone does not make the disease stage IVA, and the distinction changes the treatment intent completely.
Did You Know? Your stage is fixed at diagnosis and is never revised afterwards, however well treatment goes. Both the FIGO staging conventions and the AJCC Cancer Staging Manual require the stage to be recorded once, from the evidence available before treatment begins, so that outcomes from different hospitals and countries can be compared honestly. A woman treated successfully for stage IIB disease is described for the rest of her life as having had stage IIB cervical cancer — the label describes the starting point, not where she has got to. Sources: FIGO Committee on Gynecologic Oncology; AJCC Cancer Staging Manual.
Why Women Have Their Staging Confirmed at CION
Among cervical cancer patients treated at CION, 1-year survival has been 83.3%, against a national figure of 67.3%. Getting the stage right, early, is a large part of what sits behind a difference like that.
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Common questions
FIGO Staging of Cervical Cancer — Frequently Asked Questions
What do the letters r and p after my stage mean?
They tell you what evidence the stage was assigned from. Since the FIGO 2018 revision, imaging and pathology may both be used in staging, so the system added notations to record which was used: an "r" means the stage rests on radiological findings such as MRI or PET-CT, and a "p" means it rests on a pathology specimen — tissue actually examined under the microscope. So stage IIIC1r means involved pelvic nodes were seen on a scan, while IIIC1p means they were confirmed in tissue. The distinction matters because imaging is very good but not infallible, and a team may occasionally sample a node before acting on an r-stage.
Will my stage change after surgery if the specimen shows something different?
The FIGO stage recorded at diagnosis stays as it is. What the operative specimen shows is documented separately, and it can absolutely change your treatment — findings such as involved lymph nodes, cancer at the surgical margin, or invasion of small vessels commonly lead to radiation being recommended after surgery. But the stage itself is not rewritten. Staging conventions require it to be fixed from the evidence available before treatment began, so that outcomes can be compared between hospitals and over time. If your team talks about "upstaging" after surgery, they usually mean the pathology found more than expected and the plan is changing accordingly.
My scan says stage IIIC1. Does that mean the cancer has spread through my body?
No. Stage IIIC1 means cancer has been found in lymph nodes within the pelvis, which is the first place cervical cancer travels to and is still regional disease, not distant spread. It is treated with the intent to cure, using radiation with chemotherapy and brachytherapy, with the radiation field widened to cover the involved nodes. Distant spread — to the lungs, liver, bones or nodes above the collarbone — is stage IVB and is a different situation entirely. Because node involvement defines IIIC on its own, women with quite small tumours can carry this label, which is why it is worth having it explained rather than read online.
Is FIGO staging the same as the TNM system I have seen mentioned?
They are two systems describing the same anatomy. TNM records three things separately — the tumour, the nodes and any metastasis — and is used across most cancers. FIGO condenses that into a single stage and is the system used for gynaecological cancers, including the cervix. The two are aligned, and your pathology report may quote both. In practice, treatment guidelines from NCCN and ESMO are written around the FIGO stage, so that is the number your oncologist will work from and the one worth understanding.
Can my stage be decided without an MRI?
It can be, but the work-up is less complete. Very early disease found on a cone or loop specimen is staged microscopically — stage IA is defined by measurements made under the microscope and cannot be assigned from a scan at all. Beyond that, MRI is what establishes tumour size, depth and whether the tissue beside the cervix is involved, which is the finding that separates a surgical plan from a radiation plan. If you have been given a stage above IA without an MRI, it is entirely reasonable to ask whether one is needed before treatment is decided.
Medical disclaimer: This page is general health information, reviewed by a CION oncologist. It summarises the FIGO 2018 staging system for cervical cancer and cannot replace assessment of your own reports and images by a treating team. Staging is assigned by clinicians who have examined you and reviewed your investigations, and treatment recommendations within any stage vary from woman to woman.