The cancer doctor trying to stop his brain tumour killing him

On opposite sides of the world, Richard Scolyer and Georgina Long each took one look at a scan and their hearts sank.

In front of them was, to the untrained eye, an innocuous-looking brain.

But these long-time friends - both leading skin cancer doctors - feared it held a ticking time bomb.

Nestled in the top right corner of Prof Scolyer's skull was a section of matter lighter and cloudier than the rest.

"I'm no expert in radiology, but… in my heart I knew it was a tumour," he tells the BBC.

Neurosurgeons soon confirmed it wasn't just any brain tumour, but "the worst of the worst" - a subtype of glioblastoma so aggressive most patients survive less than a year.

Devastated but determined, he and Dr Long set out to do the impossible: to save his life by finding a cure.

And it may sound crazy, but the Australian researchers have done it before, with melanoma.

"It didn't sit right with me… to just accept certain death without trying something," Prof Scolyer says.

"It's an incurable cancer? Well bugger that!"

Thirty years ago, when Prof Scolyer and Dr Long met as bright, young doctors, advanced melanoma was a death sentence.

But that's exactly what drew them to it.

Australia has long had the highest rate of the skin cancer on the planet and where many saw a daunting challenge, they saw potential.

"[Back] when I was doing the cancer block the most challenging patients to see were the ones with advanced melanoma. It was heartbreaking," Dr Long says.

"I wanted to make a difference."

Today, it's near impossible to overstate their impact on the field.

Anyone who gets a diagnosis or treatment for melanoma worldwide does so because of the work pioneered by the Melanoma Institute that they now lead.

Over the past decade, their team's research on immunotherapy, which uses the body's immune system to attack cancer cells, has dramatically improved outcomes for advanced melanoma patients around the world. Half are now essentially cured, up from less than 10%.

That breakthrough - or as Dr Long calls it, "penicillin moment" - is now being applied to many other cancers, saving even more lives.

It has made the duo national treasures. Almost every Australian would know someone impacted by their work and this year they've been jointly named as the Australians of the Year.

But as they were transforming the field, they were also leaving their mark on each other.

They bonded over frustration at the cases they couldn't crack, the highs of life-changing discoveries, a love of exercise, and a lofty ambition of reaching zero melanoma deaths in Australia.

"We're very different but very similar in that sort of… roll up your sleeves, get things done way," Dr Long says.

Eyes shining, the medical oncologist rattles off a list of qualities - brave, honest, upbeat, driven - which make Prof Scolyer the dream colleague and friend.

"He's a delight," she surmises.

And so, after she received that fateful call from Poland last June - where Prof Scolyer was on holiday when a seizure triggered his diagnosis - she spent the night crying.

"I'm grieving… I'm thinking my friend is going to be gone in 12 months."

But then she spent the morning plotting - poring over textbooks, researching clinical trials, and firing off emails to colleagues globally.

Glioblastomas, found in the brain's connective tissue, are notoriously aggressive and the general protocol for treating them - immediate excision then radiotherapy and chemotherapy - has changed little in two decades.

Survival rates have fared similarly. Still, only 5% of all patients live beyond five years.

Desperate, Dr Long formulated a radical plan to treat Prof Scolyer based on what had worked in melanoma, but which had never been tested in brain cancer.

In melanoma, Dr Long and her team discovered that immunotherapy works better when a combination of drugs are used, and when they are administered before any surgery to remove a tumour.

It's like training a sniffer dog, she explains: you give it a smell of the contraband, in this analogy the cancer cells, for it to be able to hunt them down later.

Prof Scolyer jokes that trying the treatment was a "no brainer".

But it comes with huge risks.

Some oncologists were sceptical that the drugs would reach his brain at all, and even if they did, that his immune system would respond.

And they worried the experiment could kill him faster.

Many brain cancers grow so rapidly that even a two-week delay to surgery could mean it's too late to operate, they said. Immunotherapy drugs are quite toxic, especially when mixed, so he could be poisoned. And if either of those things caused the brain to swell, he could die instantly.

At home colleagues quietly shared fears Dr Long's emotional ties were clouding her judgement.

"They were saying… 'Just let the neuro-oncology experts do their thing and be his friend'," she says.

"[But] he needs us… We have all this depth of knowledge, it's our duty."

And so, under the care of Dr Long and a team of experts, Prof Scolyer became the first brain cancer patient to ever have combination, pre-surgery immunotherapy.

He is also the first to be administered a vaccine personalised to his tumour markers, which boosts the cancer-detecting powers of the drugs.

Weeks after that initial scan sent their lives into a tailspin, Prof Scolyer and Dr Long looked at another test result.

It was an analysis of the tumour that had been carefully plucked from Prof Scolyer's skull.

"I was blown away. In a millisecond," he says.

"It was bloody obvious that it is doing something."

Not only were there traces of the drugs in the tumour - proving the medication had reached his brain - there was an explosion of immune cells. And they were "activated", giving the team hope they would be attacking his cancers cells at that very moment.

The average time for a glioblastoma cancer to return is six months post-surgery. But eight months on, after continued immunotherapy, Prof Scolyer is showing no signs of active cancer.

Just last week, another scan came back clean and Dr Long says his brain is "normalising".

The results so far have generated huge excitement.

There's creeping hope that this could prolong Prof Scolyer's life.

But there's also optimism that the duo may be on the cusp of a discovery which could help the 300,000 people diagnosed with brain cancer globally each year.

This kind of research would usually take years - even decades - but what Prof Scolyer and Dr Long have achieved in mere months has already attracted interest from pharmaceutical companies and generated talk of clinical trials.

Roger Stupp, though, is more tempered.

The doctor - after whom the current protocol for treating glioblastomas is named - says Prof Scolyer's prognosis is "grim", and that it's too early to tell if this treatment is working.

"Promising is a difficult word… Encouraging, I would call it," he tells the BBC from Chicago.

"It's not a revolution, but it is still a step forward."

He wants to see Prof Scolyer reach 12 months, even 18, without recurrence before he'll be persuaded.

But Dr Stupp says he is "absolutely" confident that immunotherapy can change the treatment of brain cancer - the science just hasn't been cracked yet.

"We need to get out of our silos and look at what worked in other tumour types," he says.

Prof Scolyer and Dr Long are also trying to resist being swept up in the buzz.

The best-case scenario is that Prof Scolyer is cured, but they call the odds of that "miniscule".

"A miracle could happen," Prof Scolyer says.

As for the worst-case scenario, he tells the BBC he's already beaten it: "I would have died before now."

Instead, he celebrated his 57th birthday in December, and another Christmas with his family - wife Katie, and his teenage children Emily, Matthew, and Lucy.

But with the gratitude for each additional milestone, every clear scan, is the fear it's his last.

"It's tough," Dr Long says of treating her friend.

They've had discussions about death and funerals. "He's extraordinarily resilient," she adds.

But sitting in his office - surrounded by pictures of his children, tasks scribbled on a whiteboard and shelves filled with framed accolades - Prof Scolyer tears up.

For all his outward positivity, he admits he's also scared and soul-crushingly sad.

"I love my family. I love my wife… I like my work," he says with a grimace.

"I'm pissed off. I'm devastated… I don't want to die."

But giving him comfort is the idea that this research could bring meaning, some purpose, to his diagnosis.

"The data that we've generated - I know it's changing the field, and if I die tomorrow with that, I'm very proud."