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(CNN) — Former President Jimmy Carter announced Wednesday that cancer is spreading throughout his body.

The 90-year-old underwent surgery earlier this month to remove what his office called a “small mass” from his liver.

“Recent liver surgery revealed that I have cancer that now is in other parts of my body,” the 39th president said in a statement. “I will be rearranging my schedule as necessary so I can undergo treatment by physicians at Emory Healthcare. A more complete public statement will be made when facts are known, possibly next week.”