MR Fistulogram in Delhi: MRI for Anal Fistula, Surgery Planning & Cost — 2026 Patient Guide

You have had a discharging opening near the anus for months. Perhaps it was operated once already and came back. Perhaps you have not told anyone at all.

If that is you, the first thing worth saying is this: an anal fistula is an extremely common surgical condition, it is nobody’s fault, and it is not something doctors find remarkable or embarrassing — they see it every week. What it is, however, is a condition that recurs stubbornly when it is operated without being properly mapped first. That is the entire reason the MR fistulogram exists.

This guide explains what the scan shows, why surgeons increasingly refuse to operate on a complex fistula without one, the single finding on the report that most affects your future quality of life, what the scan involves, and what it costs in Delhi in 2026.

The quick answer

An MR fistulogram (also written MRI fistulogram, and sometimes misspelled fistulagram) is a dedicated, high-resolution MRI of the anal region that maps a fistula-in-ano — an abnormal tunnel between the anal canal and the skin. It shows the primary track, any secondary branches, the internal opening, any undrained abscess, and — most importantly — how much of the anal sphincter muscle the track crosses.

It takes about 30–45 minutes, uses no radiation, requires no tube or dye inserted into the fistula, and usually needs little or no preparation. In Delhi it generally costs in the region of ₹7,000–₹14,000, depending on whether contrast is included. It is considered the reference standard for planning fistula surgery, and it is the main reason a well-planned operation succeeds where a hurried one fails.

First, what an anal fistula actually is

Understanding the anatomy makes everything else on this page make sense.

There are small glands inside the anal canal. If one becomes infected, pus collects and forms an abscess. That abscess needs an escape route, so it tunnels outwards and bursts through the skin near the anus — often with a period of severe pain that suddenly relieves when it discharges. Once that tunnel exists, it tends to stay open: a persistent track running from an internal opening inside the anal canal to an external opening on the skin, discharging pus, blood or fluid on and off for months or years.

The problem is that the tunnel does not necessarily run in a straight, simple line. It may branch. It may run around the anus in a horseshoe shape. It may extend upwards above the pelvic floor muscles. There may be a second, silent collection nowhere near the visible opening. And it passes through or between the muscles that control continence.

Why fistulas recur — and what the MRI has to do with it

This is the heart of the matter. Anal fistulas have a reputation for coming back after surgery, and the reasons are consistent and well recognised:

• The internal opening was never found. If the source inside the anal canal is not identified and dealt with, the track simply re-forms. It is the commonest cause of recurrence.
• A secondary branch was missed. The main track was treated, an undetected side branch was not, and the disease continues from there.
• An undrained abscess remained. A collection sitting above or behind the treated area keeps the process alive.
• A high or supralevator extension was not appreciated, so the operation addressed only the part below it.

Every one of those is a mapping failure, not a surgical skill failure — and every one of them is exactly what an MR fistulogram is designed to prevent. The scan lets the surgeon walk into theatre already knowing the shape of the problem, rather than discovering it halfway through.

This is why the query so many people search — MRI fistulogram planning — is precisely the right way to think about the test. It is not a diagnostic curiosity. It is the operative plan.

The finding that matters most: sphincter involvement

If you read only one line of your report with care, make it the one describing the relationship of the track to the sphincter muscles.

The anus is controlled by two muscular rings — the internal and external sphincters — and they are what keep you continent. Fistula surgery frequently involves dividing tissue along the track. Divide too little and the fistula recurs; divide too much sphincter and continence can be permanently affected. That trade-off is the central dilemma of fistula surgery, and it is decided by how much muscle the track crosses and how high it sits.

Radiologists describe this using established systems — the Parks classification, which groups fistulas as intersphincteric, transsphincteric, suprasphincteric or extrasphincteric according to their path through the muscles, and grading systems such as the St James’s University Hospital classification, which combines the track’s course with the presence of abscesses and extensions.

You do not need to memorise these. What you need to know is that they are the language in which your surgeon reads the report, and that they directly determine which operation is appropriate for you — a straightforward laying-open procedure for a low, simple track, or a sphincter-preserving approach such as a seton, an advancement flap, LIFT or another technique for a high or complex one. That choice is your surgeon’s, made with the MRI in hand.

What else the scan can reveal

• Crohn’s disease. A perianal fistula — particularly one that is complex, multiple, or recurs repeatedly — can be the first presentation of Crohn’s disease. MRI features may raise that possibility, which changes management completely, because the treatment then involves medical therapy alongside surgery rather than surgery alone. Related bowel assessment is covered in our CT enterography guide.
• Tuberculosis, which in India remains a relevant cause of a chronic, non-healing perianal track.
• Horseshoe extension — a track curving around the anal canal to the opposite side, easily missed clinically.
• Post-operative assessment — distinguishing a recurrent track from ordinary post-surgical scarring, which examination alone often cannot do.
• Pilonidal sinus and other perianal conditions that can be confused with a fistula.
• Rarely, other pathology in the region that needs to be excluded before an operation.

MR fistulogram vs the older “fistulogram” — not the same test

The names cause real confusion, so it is worth being clear.

Test	What happens	Where it stands today
Conventional fistulogram	Contrast dye is injected into the external opening and X-rays are taken	Largely superseded — it fills only what it can reach, shows no muscle, and uses radiation
MR fistulogram	MRI with high-resolution sequences around the anal canal. Nothing is inserted into the fistula	The reference standard for mapping and surgical planning
Endoanal ultrasound	A probe inside the anal canal	Useful and quick in expert hands, but limited for high or distant extensions
Examination under anaesthesia	The surgeon examines and probes the track in theatre	Still valuable — and considerably more accurate when guided by an MRI done first

The single most reassuring point for most patients: despite the name, an MR fistulogram involves nothing being pushed into the fistula. No probe, no dye into the opening, no discomfort in that area at all. If any contrast is used, it goes into a vein in your arm, exactly as in any other MRI.

With contrast or without?

Modern MR fistulogram protocols rely heavily on high-resolution fluid-sensitive sequences, which show an active track very well without any injection. Many centres nonetheless add intravenous contrast, because enhancement helps to distinguish an active, inflamed track from old fibrous scar, defines the wall of an abscess, and is particularly useful in recurrent or post-operative cases where scarring is extensive.

Your prescription and the clinical question decide. If contrast is planned, the usual checks apply — a recent kidney function report may be requested, and you should declare any previous reaction, pregnancy or breastfeeding. Our contrast MRI (CEMRI) guide covers all of that in detail.

What the scan is actually like

Straightforward, and far less intrusive than most people fear.

1. Safety screening — the standard MRI questionnaire about pacemakers, implants, metal fragments and previous surgery. The most important form you will fill in.
2. Change into a gown, remove all metal.
3. Lie on your back on the table, with a coil placed over the pelvis. You are positioned normally — there is no special or undignified posture involved.
4. The scan runs for roughly 30–45 minutes. It is noisy; earplugs or headphones are given. Lie as still as you can — the sequences are very high resolution over a small area, so movement blurs exactly the detail your surgeon needs.
5. Contrast, if prescribed, is given through a cannula in the arm partway through, followed by a few more sequences.
6. Finish and go home. No recovery period, no restrictions, normal activity immediately.

Preparation is usually minimal: no enema and no bowel preparation are typically required, and fasting is generally needed only if contrast is planned. Confirm at booking, as protocols vary. Empty your bladder before the scan and wear metal-free clothing.

If lying still is difficult because the area is currently painful, or if you are claustrophobic, say so when you book rather than on the day. An open MRI is more comfortable for many people — see our open MRI vs closed MRI guide.

When should the scan be done?

Generally before surgery — that is the whole point, and having it afterwards means the surgeon operated without the map.

Some practical timing notes worth discussing with your surgeon:

• If you currently have an acute abscess with severe pain and fever, that usually needs prompt drainage first — an abscess is treated urgently, and detailed mapping follows once the acute episode settles. Do not delay treatment of an acutely painful, hot, swollen perianal abscess in order to arrange a scan.
• If a seton is already in place, MRI is still perfectly possible and often very informative, showing how the track has responded.
• For recurrent fistula after previous surgery, MRI is especially valuable, because clinical examination struggles to tell scar from active disease.

MR fistulogram cost in Delhi

Indicatively for Delhi in 2026, an MR fistulogram generally costs in the region of ₹7,000–₹14,000. What moves the figure:

• Plain or with intravenous contrast — the largest single factor.
• The protocol — a dedicated high-resolution fistula protocol takes longer than a routine pelvis study, and the reporting takes longer too.
• Whether a wider pelvic assessment is included alongside the fistula sequences.
• Scheme rates — if you are covered under CGHS or another empanelled scheme, the applicable rate may apply. Ask at booking and carry your card and referral.

These are indicative market ranges, not a quotation. Broader pricing is in our MRI scan cost in Delhi guide, and general pelvic imaging in our MRI pelvis guide.

One point worth making plainly, because it is where people try to economise in the wrong place: an MR fistulogram is a dedicated small-field-of-view study, not a routine MRI pelvis. A general pelvic scan may not resolve a fine secondary track or define the sphincter relationship precisely. If a quote seems unusually low, ask whether the centre is performing a dedicated fistula protocol. Set against the cost and disruption of a repeat operation, this is not the scan to shorten.

Please do not put this off

Anal fistulas are one of the conditions people delay longest, and almost always for the same reason — embarrassment. It is worth naming that directly, because the delay carries a real cost.

An untreated fistula does not usually resolve on its own. It continues to discharge, flares periodically into painful abscesses, can develop further branches over time, and becomes more complex — and therefore harder to treat with the sphincter intact — the longer it goes on. A fistula treated early is very often a simple problem. The same fistula five years later can be a difficult one.

Radiology and surgical teams deal with this condition routinely and matter-of-factly. There is nothing to explain and nothing to apologise for. Getting it mapped and treated properly is simply the shortest route back to not thinking about it at all.

Get your MR fistulogram at Edge Imaging & Diagnostics, West Delhi

Edge Imaging & Diagnostics is a NABH-accredited diagnostic centre in West Delhi offering MRI, CT, ultrasound, digital X-ray, pathology and image-guided procedures under one roof, with all studies reported by experienced radiologists. MR fistulogram studies are performed on a dedicated high-resolution protocol and reported in the terms a colorectal surgeon works from — track course and classification, internal opening, secondary extensions, abscesses, and the relationship to the internal and external sphincters — because a vague report on a fistula is of no use in an operating theatre. Privacy is maintained throughout, and an open MRI option is available for patients who find conventional scanners difficult.

We perform and report the scan; your treatment is planned by your surgeon using it. Send us the prescription and we will confirm the correct protocol, whether contrast is required, what preparation is needed, and the current cost before you travel. We serve patients across Paschim Vihar, Punjabi Bagh, Rajouri Garden, Moti Nagar, Janakpuri, Tilak Nagar and nearby areas.

📩 Send your prescription on WhatsApp  |  Call 9555999960

If the Crohn’s disease also involves your small bowel, this pelvic study does not cover it. The companion scan is an MR enterography, which maps small bowel inflammation, strictures and fistulas. Many patients need both at different points, and they are not substitutes for each other.

Frequently asked questions

What is an MR fistulogram?

It is a dedicated high-resolution MRI of the anal region that maps a fistula-in-ano — showing the primary track, secondary branches, the internal opening inside the anal canal, any undrained abscess, and how much sphincter muscle the track crosses. It is considered the reference standard for planning fistula surgery.

How much does an MRI fistulogram cost in Delhi?

Indicatively, an MR fistulogram in Delhi generally costs in the region of ₹7,000–₹14,000, depending mainly on whether intravenous contrast is included and how detailed the protocol is. These are indicative market ranges, not a quotation — send your prescription on WhatsApp or call 9555999960 for our current price.

Is anything inserted into the fistula during the scan?

No. Despite the name, nothing is passed into the fistula or the anus. You simply lie on your back on the MRI table. If contrast is used, it is injected into a vein in your arm, exactly as in any other MRI.

Is the MR fistulogram painful?

No. The scan itself is completely painless and uses no radiation. The only requirement is lying still for around 30–45 minutes. If the area is currently sore, tell the radiographer so you can be positioned comfortably.

Do I need an enema or bowel preparation?

Usually not. Most MR fistulogram protocols need no enema and no bowel preparation. Fasting is generally required only when contrast is planned. Confirm the specific requirement when you book, as protocols vary between centres.

Why does my surgeon want an MRI before fistula surgery?

Because the commonest reasons a fistula recurs are a missed internal opening, an undetected secondary branch, or an undrained abscess — all mapping problems. The MRI shows the full shape of the track and, critically, how much sphincter muscle it involves, which determines which operation can be done safely without risking continence.

How long does an MR fistulogram take?

Usually about 30–45 minutes on the table, longer if contrast is given, plus time for registration, changing and the safety check.

Does an MR fistulogram need contrast?

Not always. High-resolution fluid-sensitive sequences show an active track well without injection. Contrast is commonly added to distinguish an active track from old scar, to define an abscess wall, and particularly in recurrent or previously operated cases. Your prescription and the radiologist decide.

Can an MRI tell if my fistula is due to Crohn’s disease?

MRI can show features that raise the possibility — complex, multiple or repeatedly recurring perianal fistulas are recognised presentations of Crohn’s disease. It cannot confirm the diagnosis alone; that requires assessment of the bowel, endoscopy and other tests arranged by your doctor. Raising the possibility matters, because it changes treatment substantially.

Can the scan be done if I already have a seton in place?

Yes. A seton does not prevent the scan and the study is often particularly useful in that situation, showing how the track has responded and what remains to be treated. Mention it when booking so the team is aware.

I have severe pain, swelling and fever near the anus right now. Should I book a scan?

See a surgeon promptly instead. Those symptoms suggest an acute abscess, which usually needs urgent drainage rather than an outpatient appointment for imaging. Detailed mapping is done once the acute episode is under control. Do not delay treatment in order to arrange a scan.

Will an MRI show whether I will become incontinent after surgery?

It cannot predict an outcome, but it provides the information the decision rests on — how much of the internal and external sphincter the track crosses and how high it runs. That is what allows your surgeon to choose a sphincter-preserving technique where one is needed. The surgical decision and its risks are matters to discuss with your surgeon.

The bottom line

An anal fistula is a mechanical problem: a tunnel with a beginning, an end and sometimes branches, running through muscles you cannot afford to damage. Operating on it without a map is how it comes back — and how patients end up on their second or third procedure. The MR fistulogram is that map, it involves nothing being inserted anywhere, and it takes well under an hour.

If you have been putting this off out of embarrassment, that is the most common reason of all and the least useful one. Take the prescription, get it mapped, and let your surgeon plan the operation properly the first time.

---

MRI, CT, ultrasound, digital X-ray, pathology and image-guided procedures at Edge Imaging & Diagnostics, West Delhi — a NABH-accredited diagnostic centre — are performed and reported by experienced radiologists. Edge Imaging & Diagnostics performs and reports diagnostic imaging; fistula surgery and its planning are carried out by your treating surgeon. This article is general patient information only. It is not a diagnosis, not medical advice for your individual situation, and not a substitute for consultation with a qualified doctor. Whether you need an MR fistulogram, and whether contrast is appropriate, is decided by your treating doctor together with the reporting radiologist. Acute perianal pain, swelling and fever require prompt surgical assessment rather than an outpatient scan. Costs mentioned are indicative market ranges for Delhi and are not a quotation — please contact us for current pricing. Last updated: 2026.