Rock band Status Quo have cancelled the remainder of their UK tour after singer and guitarist Rick Parfitt was found to have a growth in his larynx.
Status Quo's Rick Parfitt (left) has throat problems
The band called a halt to the tour after the problem was found the day they were due to play to about 3,000 fans at Plymouth's Pavilions venue.
The decision was taken after Parfitt was seen by doctors at the city's Nuffield Hospital on Thursday.
Refunds will be given for the 10 other dates at the point of purchase.
Band manager Simon Porter said: "This morning Rick saw consultant Stephen Toynton, ENT surgeon at the Nuffield Hospital in Plymouth, who expressed concern with a growth in Rick's larynx and has recommended that it requires urgent investigation.
"Consequently all nine shows on the current sell-out UK tour have been cancelled.
"Whilst the band obviously regret having to disappoint their fans, they are thankful for their understanding at this difficult time and look forward to seeing them soon."
The cancelled shows will not be re-scheduled. Tickets would be refunded at the point of purchase, Mr Porter said.
Staff at the Pavilions said they would be getting in contact with ticket-holders to arrange their refunds.
The band were due to appear in: Brighton, Birmingham, Harrogate, Manchester, Telford, Bournemouth, Wembley Arena, Glasgow, Aberdeen and Edinburgh.
In 1997, Parfitt had a quadruple heart bypass after doctors said he could die at any time following a hard-living lifestyle involving drink and drugs.
Rick Parfitt had a quadruple heart bypass in 1997
Even after the life-saving surgery, the guitarist said he had would not become a "born-again Christian" and still enjoyed the "odd pint".
The veteran rockers are celebrating their 40th year as an act and recently released a DVD marking their four decades together.
Status Quo have scored more hit singles than any other band in UK chart history, with 61 chart hits since their first smash, Pictures of Matchstick Men, was released in 1968.
Among their best-known songs are their British chart topper Down Down in 1974 and Rockin' All Over The World in 1977.