"Highway to Heaven" star Michael Landon, diagnosed a month ago with inoperable liver and pancreas cancer, has learned the disease has spread to his colon, his spokesman says.

But spokesman Harry Flynn said the actor has been comforted by fans, who have sent him about 40,000 cards and many gifts, including bottles of holy water and cancer-cure cassette tapes.Landon, 54, is known to TV viewers as Little Joe on "Bonanza," the family patriarch on "Little House on the Prairie" and an angel on "Highway to Heaven."

The actor learned he had an often deadly form of cancer on April 5. Doctors who prescribed chemotherapy are also considering interferon treatment for Landon, whose at-home regimen includes health food and coffee enemas, Flynn said.