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Def Leppard guitarist Vivian Campbell has revealed his cancer has returned.

The 63‑year‑old rocker underwent a donor bone marrow transplant in January 2025 after first being diagnosed with Hodgkin's lymphoma in 2013.

He took time out to recover before rejoining the Pour Some Sugar On Me hitmakers in May this year, and a month later revealed he was in remission.

He has now confirmed the cancer is back and expects to need another transplant.

Despite the setback, Vivian says he refuses to let the illness define him - and urges other cancer patients to stop centring their lives around their diagnosis.

Speaking on El Salvador's Radio YSKL FM, he said: 'Well, I think you have to keep moving forward. And I do think that that's what helped me, even when I was at a really low ebb with cancer treatment.

Def Leppard guitarist Vivian Campbell, 63, revealed his cancer has returned on Thursday, but said he's 'determined to live life to the fullest'

'The fact that I could still continue to work, that gives me something to live for, something that you enjoy, that you're passionate about, that you can wake up in the morning and look forward to. I think that deflects, that takes away from focusing too much on cancer.'

He continued: 'Unfortunately, I have met people in my life who, when they've gotten a cancer diagnosis, they've only focused on that. And they think, 'Oh, I can't do anything. I need to stay in bed. I can't eat this. I can't do that. I can't go there.'

'I've never felt that way. I've always felt like I'm gonna continue to live my life as much as possible. In fact, even more so. After getting a cancer diagnosis, it amplifies that desire to tick all the boxes, to do the things you wanna do.

'But I also consider myself very fortunate because I caught my cancer early. So, it's always been more about managing my cancer.'

Confirming he was no longer cancer-free, Vivian went on: 'There's only been one time that I felt it was gonna kill me. In the winter of 2023, I got really scared about what was happening and the pace at which it was happening.

'And I realised at that point that I had to do a donor transplant. It was my only hope to survive. And that's what I did. I did that in January of '25. I did a donor transplant.

'Unfortunately, it didn't stick. So the cancer has returned. And I'm continuing treatments to manage it. I'll probably have to do another transplant within a few years with another donor to try and see if maybe that would cure me.

'But in the meantime, I'm certainly not slowing down. I'm doing as much with my life as possible, not just with Def Leppard and with [his side project] Last In Line.

The rocker was diagnosed with Hodgkin's lymphoma in 2013 (seen far left with bandmates Joe Elliott, Rick Savage, Jon Bon Jovi, Rick Allen, Phil Collen in October 2025)

'I'm also rally driving, 'cause I always wanted to do that. So I've been doing that more and more, 'cause I love cars and I love driving. And as a child, I thought, 'If I don't play guitar for a living, I'm gonna be a race car driver.''

He added: 'So, I'm very, very, very fortunate and blessed that I get to do both.'

He added: 'So, yeah, life is for the living. And I encourage everyone to look after their own health. And if you are unfortunate enough to get a cancer diagnosis, to overcome the fear.

'Fear is inevitable when you're first told those words. But once you get over that, you gotta realise just how to manage it and how to deal with it as best as possible, and just don't give in.'

Vivian previously shared that he's 'not afraid to die' as he opened up about his cancer diagnosis.

Speaking on the Fueled With Chris Cyr podcast in September, he said: 'I can tell you it made me spend more money. 'Cause, as Jerry Seinfeld said, ''You can't drive money.''

'So as soon as I got — not as soon as, but within a year of having my cancer diagnosis, I went and bought a very expensive Porsche.

'And I remember thinking, 'Oh, that's a lot of money. It's a lot of money.' And I [thought], 'I could be dead next week.'

'Well, actually, there is a saying in Ireland: 'You're a long time dead.' So I sort of take it to heart. I'm a little bit reckless in that way.'

'And as I see it, you can go one of two routes — you can capitulate to it or you can just live your life. And I decided to do the latter.'

Def Leppard previously issued an update about Vivian's health, after he was forced to miss the band's tour.

Speaking in a video, Joe Elliott said: 'It's a kind of a one-off gig and we're doing it a man down as Vivian is not here.

'Vivian is recuperating from cancer surgery and he's doing very well, but he's in a bubble he's not allowed to travel.

'So John Zocco – basically Phil [Collen's] guitar tech – has manfully stepped up to the plate because he's a phenomenal player himself and he can sing a bit as well.

'So, rather get some stranger in that we don't know, he's doing it, which is fantastic.

'We have every confidence that it will go swimmingly until our boy Vivian is back on the stage with us.'

Formed in Sheffield in 1976, Def Leppard became a cornerstone of the new wave of British heavy metal and 1980s stadium rock.

The band has sold over 100 million records worldwide with global blockbusters like Pyromania and Hysteria.

In recent years the band have continued to tour and release music, and in 2019 they were inducted into the Rock and Roll Hall of Fame.