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Last year, Conor Oberst unexpectedly canceled a few solo concerts and a tour with his band, Desaparecidos.

Now we know why: Oberst has a cyst on his brain.

"It’s probably been there my whole life," Oberst told New York magazine in an interview published Monday.

He explained that the cyst is nothing to worry about for the time being.

Last year, Oberst canceled 22 performances after being admitted to a Jacksonville, Florida, hospital for laryngitis, anxiety and exhaustion.

Oberst felt faint, and tests showed he had high blood pressure and abnormalities in his brain, according to the magazine story. The cyst was discovered at the Mayo clinic.

"Now I’m taking medicine for (high blood pressure) and taking happy pills to feel less stressed out," he said.

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