ATLANTA (AP) — Doctors say former President Jimmy Carter's cancer treatment will depend on the type of cancer, its origin and factors such as age and health.

Carter announced Wednesday that recent liver surgery found cancer that has spread to other parts of his body and he will be undergoing treatment.

The deputy chief medical officer of the American Cancer Society, Dr. Len Lichtenfeld, says the first task likely will be determining where the cancer originated, which can help determine what treatment the 90-year-oldCarter may be eligible for.

Dr. Lodovico Balducci, a specialist on treating cancer in the elderly, says age by itself doesn't preclude successful cancer treatment. He says much depends on the patient's "biological" age versus his actual years.

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