A friend of mine with breast cancer just sent out an update e-mail to friends and family. She began her message with an apology for her recent lack of communication. But she assured us all that she's been out of the loop not because she's felt sick or tired. It's because she's been too busy with normal life. And that's a good thing, she says.

This friend wasn't so sure how she would fare -- both physically and emotionally -- when she was first diagnosed with cancer. But she seems to have done a champion's job of rolling with the punches. Sure, she's had ups and downs. But she is overwhelmingly positive and hopeful. And jumping off my computer screen as I read her e-mail were at least seven bits of hope that tell me she is doing just fine despite all that is unbelievably hard about breast cancer.

My friend just had her first infusion of Taxol. A breeze, she calls it. One. So easy on her body -- two -- that she headed right out and took her daughter communion dress shopping. Her little love looked beautiful, she wrote. Like a mini-bride. The mother of the mini-bride then -- three -- turned a sad moment into a comforting one when her daughter asked, "Mommy, who do you think will bring me wedding dress shopping?"

Her diagnosis came at the same time as mine -- in November 2004, just after her husband, John Edwards, and John Kerry lost the presidential election. She received the same treatment as I did -- lumpectomy, chemotherapy, and radiation -- and so I was especially interested in her breast cancer journey as it paralleled my own in many ways. But just after her diagnosis surfaced in the media, Elizabeth Edwards disappeared from the radar -- perhaps like we all do in some way while immersed in the maze of cancer. So I lost track of her. But now -- almost two years later -- Edwards is back from cancer, back in the headlines, and back with a new book, Saving Grace.

Edwards, 57, reveals on the pages of her book the intricacies of her cancer ordeal. She shares that she experienced every side effect possible throughout her treatment. She bruised, bled, developed sores in her mouth, experienced numbness in her hands and feet, lost her hair, felt nauseated, ached in her bones and joints, and suffered yellowed and damaged nails -- and then chemotherapy stopped and she went on to the burning, blistering effects of radiation. Still, she managed to survive. And she thanks those who helped her survive -- for their tenderness, encouragement, humor, tears, and love -- and she writes all about it in her memoir that reveals how she juggled life and marriage and kids and cancer and how she arrived in a new place. A happy place.

There are as many carcinogens in marijuana as there are in tobacco, but researchers were surprised to find that people who smoke marijuana are not at an increased risk for developing lung cancer. In fact, marijuana smokers might be receiving a weak level of cancer prevention. People who smoke cigarettes are definitely at a greater risk for developing cancer as a result of smoking, and the more they smoke tobacco, the greater the risk for cancer. But pot smokers do not seem to share the same risk.

According to researchers, and the research, even very heavy, long-term marijuana users who had smoked more than 22,000 joints over a lifetime seemed to have no greater risk than infrequent marijuana users or those who never smoked.

Wondering why? Researchers believe it is the THC in marijuana that acts as protection against the damage experienced by any carcinogens a marijuana smoker is exposed to while smoking. Past research has shown that THC has anti-tumor properties. So much for that argument against medical marijuana use.