Def Leppard guitarist Vivian Campbell has pulled out of the band's North American tour after revealing he is being treated for a recurrence of cancer.
Campbell, originally from Co Antrim, is being treated for Hodgkin's lymphoma, a blood cancer.
Campbell, who has also played with Thin Lizzy, Dio and Whitesnake, has been in and out of remission for two years.
Def Leppard and Whitesnake are set to play Belfast's Odyssey Arena in December, although it is too soon to say whether Campbell will be able to play.
"I'm saddened by the fact that my cancer has returned. However, I'm beyond consolation that its return will prevent me from being able to do my job for a while," Campbell (52) wrote on his Facebook page.
"I'm still working on a schedule of treatment, but I will see you all very soon. My apologies."
But the Maze man has kept his sense of humour, posting a photo on Facebook of himself onstage with the caption: "I suppose I ought to update my profile picture while I still have some hair."
The Sheffield band had been scheduled to play 50 cities across the US and Canada, kicking off in Florida today.