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The Protocol

The Review

Thu, 5 Jun 2025

Description

The heated debate is not limited to the U.S. In England, a pediatrician tasked with figuring out how the country’s health care system should provide the care finds that the evidence is “remarkably weak.” One major medical group argues that’s missing the point — and repeating history.

Audio
Transcription

Chapter 1: Who is Dr. Hilary Cass and what is her role?

13.055 - 37.986 Dr. Hilary Cass

Yes. So my name's Hilary Cass. I'm chair of the Independent Review into Services for Gender Questioning Young People. And I was selected because I have previously been a president of the Royal College of Paediatrics and Child Health. And so that gives me a fairly high profile role in policy and

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39.326 - 48.649 Dr. Hilary Cass

And having just started my retirement, the phone went and NHS England asked if I might be interested in taking on this role.

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49.289 - 53.43 Host

What a peaceful, calm way to start your retirement.

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54.11 - 60.732 Dr. Hilary Cass

Yes, the plans to learn how to play the saxophone and how to play bridge kind of went to the wall.

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62.321 - 75.893 Host

Well, so that's kind of connected to my next question. I was just wondering, you know, when you were first asked to conduct this review, I mean, did you have any idea of what you were walking into and how contentious this space is?

77.835 - 85.582 Dr. Hilary Cass

So I obviously had some idea of how contentious it was. It's become more toxic in the time since I took it on.

Chapter 2: What issues are being raised in the review of gender care?

87.981 - 113.983 Narrator

When Dr. Hilary Cass got a call from England's National Health Service in 2019, the country's only youth gender clinic was in crisis. The clinic was part of the Tavistock Center in London. It was called the Gender Identity Development Service, or JIDS. And over the past decade, as the demand surged and the patient population changed, a rift had formed among the staff.

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115.598 - 139.447 Narrator

Some of the providers voiced concerns about the clinic's years-long waitlist and the pressure they felt to quickly approve kids for blockers and hormones. They felt there wasn't enough time to help kids work through their issues. But they said their concerns were dismissed by other providers and by higher-ups at JIDS. Some of them said they were labeled as transphobic for speaking up.

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141.263 - 162.261 Narrator

Eventually, 10 of these providers went to a senior figure outside the clinic who interviewed them about their experiences and filed a whistleblower report concluding that JIDS was, quote, not fit for purpose. That led the clinic to conduct an internal investigation, which ultimately came to the opposite conclusion.

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163.983 - 183.836 Narrator

That's when the whistleblower report was leaked to the public, drawing national attention. A few months after that, the National Health Service brought in Cass. She had never worked with trans kids, but that was actually part of the reason she was chosen.

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184.756 - 204.283 Narrator

The NHS felt that her lack of involvement in the field made her well-positioned to lead an independent review of the care and offer recommendations for how England should move forward with services. Over the next four years, Cass conducted the most comprehensive review of the evidence in the field to date.

205.084 - 208.226 Host

What are your top takeaways from the report?

209.968 - 225.93 Dr. Hilary Cass

So the most important concern for me is just how poor the evidence base is in this area. And some people have questioned, did we set a higher bar for this group of young people? We absolutely didn't.

226.63 - 227.771 Narrator

And what she concluded.

227.791 - 234.617 Unknown Speaker

A damning new report has found that children seeking gender care on the NHS have been let down by a lack of research and evidence.

Chapter 3: What are the findings regarding the evidence base for gender care?

276.418 - 280.885 Host

what you're talking about when you say the quality of evidence is low.

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289.833 - 290.173 Dr. Hilary Cass

Yes.

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290.774 - 307.023 Narrator

So there are... In her nearly 400-page report, Cass spelled out in detail exactly how she came to her results. She wrote that she commissioned a team of researchers at the University of York to conduct systematic reviews of the evidence in the field.

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307.843 - 315.688 Narrator

They pooled together all of the studies they could find and rated them based on how strong a connection could be drawn between the treatment and the outcome.

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316.865 - 326.891 Dr. Hilary Cass

People were worried that we throw out anything that wasn't a randomized controlled trial, which is the gold standard for study design. We didn't.

327.312 - 342.381 Narrator

Actually, there weren't any randomized controlled trials, but we still... Cass said there weren't any studies in the field that compared a group that was given treatment to a similar group that wasn't, chosen at random, which is the strongest way to show that a treatment caused an outcome.

343.407 - 356.316 Narrator

These kinds of studies, known as randomized controlled trials, or RCTs, can be challenging to do in pediatrics, largely because there are so many ethical and logistical issues around doing research with children.

357.877 - 366.423 Dr. Hilary Cass

Even so… Other kinds of studies that aren't RCTs can give us really good information, but they have to be well-conducted.

366.889 - 376.156 Narrator

There were dozens of other studies the review looked at, many of which reported some positive outcomes for patients. But most were found to have weaknesses.

Chapter 4: How does the review address the rise in youth seeking gender care?

685.342 - 721.182 Narrator

She wrote, quote, She said that this polarized situation wasn't helping the kids who were caught in the middle, that the evidence was being politicized and misrepresented by people on, quote, all sides. Opponents argued that the evidence showed children were being hurt, while advocates argued that the evidence showed the treatment saved lives.

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722.403 - 727.505 Narrator

When in fact, what the evidence actually showed was, we don't know.

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732.809 - 746.365 Host

But something else I've observed and heard a lot from prominent doctors in the U.S. at least is this idea that part of the reason that there has intent to engage criticisms of the evidence is because they know it'll be used to further limit care. Right.

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748.107 - 768.906 Host

And that they feel very confident in their experience as clinicians, you know, like that they they know this will be beneficial to kids because they don't need high quality evidence to know what they've seen over and over with their own eyes in their own exam rooms, which is that this treatment can be lifesaving and help kids thrive. Yeah.

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770.168 - 791.199 Host

And it's about this firsthand experience and reconciling that with the data. I guess just as an expert who hasn't treated these kids but was brought in to independently assess this field of medicine, how do you weigh a body of evidence against this kind of firsthand clinical experience, which is also important?

792.409 - 821.278 Dr. Hilary Cass

Yeah. So I have spoken to very many clinicians in the US, in Europe and in the UK who also have many years experience and have come to a different conclusion. So you have both clinical perspectives. And that's why in the end, you can't just rely on your clinical experience. And I think

821.678 - 840.928 Narrator

For her review, Cass and her team met with over a thousand people. And it wasn't just clinicians who had differing ideas about whether the treatment helped. She also met with parents, young adults who had gotten care, and kids who were currently seeking it. And she found that within all these groups, there was a range of experiences.

841.761 - 867.908 Dr. Hilary Cass

Certainly, I've spoken to young adults who are clearly thriving for, you know, a medical pathway has been the right thing for them. And I've also spoken to young adults where it was the wrong decision, where they have regret, where they've detransitioned. And the critical issue is trying to work out how we can best predict who's going to thrive and who is not going to do well in

870.149 - 896.704 Host

The concern that you raise and that many other European health bodies have raised is not just about the low quality of evidence. It's also about the rapid increase in kids who are seeking this care over the last 10 years, most of whom are female at birth and are in their later teens, 15, 16. As is often the case in this space, I often hear two very different stories about why this is happening.

Chapter 5: What recommendations were made for future treatment protocols?

1642.865 - 1645.847 Dr. Marcy Bowers

Full stop, right? Full stop. There you go.

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1646.007 - 1656.014 Unknown Speaker

You know, why is she important? I mean, she's important because her recommendations have just been adopted by the NHS in England and Scotland and...

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1657.388 - 1681.227 Dr. Marcy Bowers

And yet you see the tens of thousands of members of the Endocrine Society, the American Academy of Pediatrics, the AMA, and the APA, all with extensive experience treating this population. Why are they somehow biased and she is not?

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1687.515 - 1714.066 Unknown Speaker

health experts in major health groups in the U.S., major health groups in the U.K., in Sweden, looking at the same data, the same scientific literature that does not respect geographic boundaries. We're looking at the same studies in this small field and reaching very different conclusions. And I think that's a really legitimate question to ask is why is that happening? Regardless of who...

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1716.07 - 1734.964 Dr. Marcy Bowers

Why is it happening? Because, you know, it feels like the same environment that enabled Paul McHugh to shut down, effectively shut down all the research in the United States for 35 years when they shut the Hopkins Clinic in 1979.

1737.926 - 1765.459 Narrator

For Marcy, the Cass Review was part of a larger pattern in the history of transmedicine. One of the first places to provide surgeries and conduct research on treatment for trans adults in the U.S. was the Johns Hopkins Gender Identity Clinic. It opened in the 1960s, and its work got a number of other universities and research institutions to start treating and studying trans patients as well.

1767.81 - 1779.514 Narrator

But in 1975, a man named Paul McHugh took over as head of the university's Department of Psychiatry. He viewed trans people as suffering from a psychiatric disorder.

1780.795 - 1795.98 Narrator

He once wrote that when providers give in to what he called the folly of transgenderism, they, quote, "...abandon the role of protecting patients from their symptoms and become little more than technicians working on behalf of a cultural force."

1799.184 - 1825.881 Narrator

Under his leadership, the department published a study on the outcomes for a small group of surgery patients, looking at what they called observable and objective measurements of well-being, like housing, education, and careers. The study, published in 1979, found that patients reported being satisfied with the procedures, but the researchers characterized those feelings as subjective.

Chapter 6: Why is there a divide in responses from medical groups in the U.S. and U.K.?

2344.141 - 2363.427 Dr. Marcy Bowers

Instead of saying that this is a nascent field, relatively speaking, and that it is, you know, its research has been essentially squelched for the last 35 years because of a similar backlash in 1979. This is Johns Hopkins, 2.0.

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2366.929 - 2375.253 Unknown Speaker

Right. And so the research that everyone's saying we need, it's just becoming less likely that we're going to get it.

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2375.993 - 2386.658 Dr. Marcy Bowers

And it's all there because it doesn't lie. The truth really doesn't lie. The research and the data, it's certainly coming.

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2399.855 - 2403.198 Host

You lead one of the biggest studies in the country.

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2403.558 - 2410.824 Narrator

Of all the research happening in the U.S., one of the most anticipated studies was being led by Dr. Jo Olson-Kennedy.

2411.144 - 2417.51 Host

I know it's been, I think, like nine years since you got the grant, eight years since you started enrolling patients.

2417.77 - 2439.644 Narrator

She'd been working on it ever since she got the big federal grant back in 2015, the same year she had that debate with Laura Edwards-Lieper at the gender conference. The grant had already produced multiple studies into youth gender medicine in the U.S., but a study that Joe was leading on psychological outcomes from puberty blockers hadn't yet published.

2439.704 - 2445.048 Host

A lot of people have said, where is this study? We want the evidence to make the case for this care.

2445.068 - 2449.07 Narrator

It promised to be the largest longitudinal study of its kind in the country.

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