Lee Ryan could lose his voice if he doesn't have surgery.

The Blue singer found a lump in his throat, which he thought was cancer and while he is relieved it's not cancerous, doctors have warned him that he will lose the use of his voice entirely if he doesn't have an operation.

The 'All Rise' singer is said to be ''devastated'' because the boy band - Duncan James, Anthony Costa and Simon Webbe - were meant to go on tour in autumn and Lee thinks he is ''letting them down'' if he has to pull out.

A source said: ''He had known something was wrong for a long time and even feared it was cancer.

''The boys have a European tour in October. He feels he's letting them down because that's now looking unlikely. They are devastated.''

The 32-year-old heartthrob - from Chatham in Kent - saw a specialist in London on Friday (07.08.15) who found a ''huge white lump'' which they believed is an ''aggressive cyst'' that is ''growing quickly'' and is more than likely caused by stress.

The source told the Daily Mirror newspaper: ''They found a huge white lump on his vocal cords.

''It isn't cancer but an aggressive cyst that is growing quickly. Stress can be a factor and he's had plenty of that.''

According to the source, his band mates have said his ''health comes first'' despite wanting him to perform on tour in October.

The source added: ''They want him there for the tour but his health comes first.''

If Lee goes ahead with the treatment, he won't be able to speak for some weeks after.