CAMBRIDGE, Mass. -- John Edwards and his wife, Elizabeth, will be back on the campaign trail Friday after announcing that she is, once again, battling cancer, but Friday she was in Cambridge.

NewsCenter 5's Gail Huff reported that Cate, the Edwards' eldest daughter, is a first-year law student at Harvard University. The couple arrived in Cambridge for a family visit Thursday.

"The campaign goes on strongly," John Edwards and his wife said Thursday, vowing to continue the Democratic nomination for president after telling the public that Elizabeth Edwards' cancer has returned and is uncurable.

Elizabeth Edwards' breast cancer was diagnosed in 2004. A biopsy this week confirmed that the cancer had spread to one of her ribs, but she said she will continue campaigning.

"I expect to do next week all the things I did last week," Elizabeth Edwards, 57, said.

After the announcement she flew to Massachusetts for a visit with her daughter and possibly for a visit to Massachusetts General Hospital, where doctors first diagnosed her breast cancer.

"They have the options of various forms of chemotherapy, of anti-hormonal therapy, which is particularly effective when the particular forms of cancer are estrogen positive," said NewsCenter 5 medical editor Dr. Tim Johnson.

Other high-profile campaigns have not been sidelined by cancer, even when candidates were undergoing treatment. Massachusetts U.S. Sen. John Kerry made public his battle with prostate cancer, as did former New York Mayor Rudy Giuliani and former Sen. Bob Dole. Sen. John McCain has had repeat occurrences of skin cancer. But what about when the patient is the candidate's wife?

"To handle this situation with their customary courage and grace speaks volumes about them as a family, as a couple and certainly as John Edwards as a person and as a possible president," said local Democratic analyst Marianne Marsh.

Edwards said no decision has been made yet on what kind of treatment will be used in her case and they do not know yet whether the cancer has also spread to her liver.

Edwards stressed that doctors had assured them the campaign would not interfere with his wife's treatment, and added: "Any time, any place I need to be with Elizabeth I will be there -- period."

Edwards is not the only candidate running for president in the shadow of a spouse's incurable health problems. Ann Romney was diagnosed in 1998 with multiple sclerosis, a progressive nerve disease that she says she's kept under control but has left her fatigued during her husband Mitt's GOP presidential campaign.

"Were she not healthy I would not have run," Romney told the AP last month. "She is able to manage her disease such that she does not overdo or cause herself physical problem. Were that not the case, we'd have made a different decision. We'd be in the sun somewhere."