Cancer Misdiagnosis: What It Means and Your Next Steps

Cancer Misdiagnosis: key facts at a glance.

Back in 2026, when Sky Sports presenter Jeff Stelling came out and said he'd been wrongly told he had cancer, it really made people sit up and think about how diagnoses can go wrong. A misdiagnosis — whether that's being told you have cancer when you don't (a false positive), or being told you're clear when actually there is something there (a false negative) — isn't something that happens all the time. But it does occur, even in the NHS. It often prompts questions about clare balding cancer diagnosis spotting signs and early intervention.

If you're someone who's worried their diagnosis might not be accurate, or you've got test results that don't seem to add up, it makes complete sense to feel anxious. Not knowing what's going on with your own body is awful. But there are practical things you can do, and understanding your rights and the process is honestly the best starting point.

What Exactly Is a Cancer Misdiagnosis?

So a misdiagnosis in cancer isn't just one thing. It covers a few different scenarios. A false positive means you're told you have cancer, but when they run more tests it turns out you don't. A false negative is the opposite — a test misses cancer that's actually there. Then there's a delayed diagnosis, where the diagnosis itself is correct but it comes too late for you to get the treatment that would've worked best. The Jeff Stelling situation? That was a classic false positive.

The way the NHS works, there are checks built into the diagnostic pathway to try and catch these errors. Multi-disciplinary team meetings, or MDTs, are one example — that's where a group of different specialists all look at your case together. Still, no test is perfect. Not a single one. And there's always a human being interpreting the results at the end of the day.

Understanding Your Diagnostic Test Results

Your diagnosis rests on your test results. That's the foundation. These could be blood tests, scans like CT or MRI, or biopsies where they take a small tissue sample. Every test has what's called a sensitivity — basically how good it is at catching people who actually have the disease — and a specificity, which is how good it is at correctly ruling out people who don't.

Now, if you've had conflicting results — say one scan looks dodgy but then a biopsy comes back clear — that doesn't necessarily mean someone's made a mistake. Sometimes it's a borderline case, or the different tests are picking up on slightly different aspects of the same thing. Your consultant ought to explain what each result means and how they've weighed everything up to reach their conclusion. If they haven't done that, you're within your rights to ask.

Your First Action: Talk to Your Clinician

Before you do anything else — and I really mean this — get a meeting booked with the doctor or specialist who gave you the diagnosis. This is probably the most important appointment you'll have. Go in prepared. Write your questions down beforehand, every single one, however small they might seem. It is also helpful to familiarise yourself with cancer diagnosis what happens next guides beforehand.

Get them to explain, in plain English, how they arrived at the diagnosis from your test results. Ask them straight: what's the chance of a false positive or false negative with the specific tests I had? A lot of the time, just hearing their reasoning laid out can put your mind at ease. But if you come away feeling like they've fobbed you off, or your questions weren't really answered — well, that's your sign to move on to the next step.

How to Get a Second Opinion in the NHS

Asking for a second opinion is completely normal. It's built into how the NHS works and it's your right. Doing it doesn't mean you think your doctor's incompetent. It just means you're being careful with your own health, which is fair enough. The usual way to go about it is asking your GP or your current specialist to refer you to a different consultant, often at another hospital.

The NHS constitution spells this out clearly. Your original doctor should provide the referral and make sure all your records and test results get passed over to the new specialist. That way, the second doctor sees the full picture and isn't working blind. What happens next? The second opinion might back up the first one, or it might give you a different angle, or it might suggest doing some more tests to get clearer answers.

Obtaining Your Medical Records

You have a legal right to see your medical records. Under the Data Protection Act 2018 and UK GDPR, you can submit what's called a Subject Access Request, or SAR, to whichever hospital or clinic is holding your records. You need to put this in writing, and there's usually no charge — unless they decide your request is manifestly unfounded or excessive, which is pretty rare.

What you'll get back includes things like clinic letters, test reports, and sometimes even notes from those MDT meetings I mentioned earlier. Honestly, looking at the raw data and seeing what the professionals actually wrote about your case can be incredibly useful. It clears things up. And if you're going for a second opinion or thinking about making a complaint, having that paperwork to hand is invaluable.

Using the NHS Complaints Procedure

If you reckon your care wasn't up to scratch — maybe you think a test was read wrong, or you weren't properly consulted about what was happening — you can make a formal complaint. The NHS does have a proper complaints procedure for exactly this sort of thing.

Cancer Misdiagnosis: what it means for you.

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Last updated: 2026-07-28 · Written by the Walton Surgery editorial team · Medical information is for educational purposes only and does not replace advice from a qualified healthcare professional.