Michael Jackson is reportedly in desperate need of an emergency transplant operation to save his life from a rare lung condition, according to the author of a new biography of the singer.

Best-selling author Ian Halperin has completed a book about Jackson’s life, which claims that the pop icon, 50, suffers from Alpha-1 antitrypsin deficiency, a potentially fatal genetic illness, as well as emphysema and gastrointestinal bleeding.

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“He’s had it for years, but it’s gotten worse,” Halperin told In Touch magazine. “He needs a lung transplant but may be too weak to go through with it … [But] it’s the [gastrointestinal] bleeding that is the most problematic part. It could kill him.”

Halperin also claims that the “Thriller” and “Bad” singer can barely speak and is 95-percent blind in his left eye.

Earlier this year, Jackson was photographed in a wheelchair. A few weeks ago, he was spotted receiving help walking, while wearing a Zorro style mask.

Jackson’s rep was not available for comment.