"The U.S. is currently home to more than 18 million cancer survivors," reports the Wall Street Journal, "over 5% of the total population" (including those who are living with the disease). Their article tells the story of Gwen Orilio, who was diagnosed with stage-four lung cancer at age 31. Ten years later she's still alive — and she still has metastatic cancer... Keeping her going is a string of new treatments that don't cure the disease but can buy months — even years — of time, with the hope…