CHICAGO (CBS) — More medical tests are planned for this week for Francis Cardinal George, as he faces another cancer fight.

As WBBM Newsradio’s Steve Miller reports, the Archdiocese says it will release more information about the cardinal’s future schedule after the cardinal meets with his doctors.

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LISTEN: WBBM Newsradio’s Steve Miller reports

First, though, the additional tests begin Cardinal George.

Last Friday, the Archdiocese announced that the cardinal had cancerous cells in his kidney and in a nodule that was removed from his liver.

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On Monday, the Archdiocese released a statement, which says: the cardinal “rested at home this weekend and was actively engaged in a number of his administrative responsibilities. This week he will continue additional testing, participate in his annual retreat and maintain his previously scheduled public commitments.”

Cardinal George, 75, was diagnosed with bladder cancer in 2006 and underwent surgery in August of that year.

Dr. Dennis Pessis of Rush Medical College University speculates the latest cancer could have come from the earlier bout.

“It’s very likely this is a metastatic lesion from the bladder,” he said.

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George, whose retirement had been imminent, has long been stoic about his lifelong health issues. He contracted polio at the age of 13.