WASHINGTON (CNN) -- The recurrence of cancer found in White House spokesman Tony Snow was attached to his liver, not in the organ itself, his deputy Dana Perino explained Wednesday.

Tuesday, Perino announced that Snow's cancer had returned and had spread to his liver.

But she said Wednesday that it was not inside the liver, an important distinction in medical terms.

Perino said she spoke to Snow Tuesday afternoon and he was "feeling good, feeling no pain."

Snow, 51, had previously been treated for colon cancer in 2005 and had his colon removed at that time.

Perino said an operation Monday to remove a growth from Snow's abdomen showed that the cancer had returned and had metastasized to his liver.

He will consult his doctors about an aggressive plan for treatment that is likely to include chemotherapy, she said Tuesday.

President Bush said Tuesday he had spoken to Snow and told him to "stay strong."

Perino said Wednesday the White House Web site now has a link for people who want to send well wishes to the spokesman.

Snow's mother died of colon cancer in at the age of 38 in 1973, when he was 17.