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Mayer later this month in Los Angeles as a show in Las Vegas, legendary singer Tony Bennett iHeartRadio music festival was due to perform with.
However, he forced him to cancel his vocal cords after the doctors had discovered near a granuloma - inflammation of the tissue mass, reports contactmusic.com.
He wrote in a message on Tumblr.com, "I know there were people depending on me to be there (at the concerts) and I'm sorry that I can't be on those stages. After several months of monitoring and hoping to correct the condition, I'm forced to cancel my upcoming singing engagements due to something next to my vocal cords called a granuloma".