John Mayer has been diagnosed with granuloma, a serious throat condition that has forced him to cancel all plans to sing in the near future. In a post on his blog, the guitarist explained that he has spent several months monitoring his condition, but has been advised by doctors to bow out of planned appearances at the iheartradio Music Festival in Las Vegas and an appearance with Tony Bennett in Los Angeles.

Mayer's condition has also set back work on his forthcoming album. "Born and Raised is complete as far as music recording, song selection, and in some cases mixing, but because of this condition I couldn’t finish singing on several of the tracks," he wrote on his blog. "This means the record will be released next year instead of this fall or winter."

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Mayer is hopeful that this illness is only a temporary issue. "I’m not sure how long or short a period of time it will be," he wrote. "I’ve got the best doctors in the country looking after me and I will be singing and touring again as soon as I get the all-clear. Until then I’ll be spending time writing and composing more music and kicking an empty soup can around the West Village."

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