Prostate cancer is the most common cancer for men in the West, while lung and liver cancers are the top problems in Asia. Courtesy of the World Health Organization hide caption

itoggle caption Courtesy of the World Health Organization

People practice yoga at a fundraiser for a breast cancer foundation in Hong Kong. Ed Jones/Getty Images hide caption

itoggle caption Ed Jones/Getty Images

4-MEI, a chemical created during the manufacturing of caramel color used to dye sodas brown, is under new scrutiny. iStockphoto hide caption

itoggle caption iStockphoto

The sexually transmitted cancer is common in street dogs around the world. Noel Celis/AFP/Getty Images hide caption

itoggle caption Noel Celis/AFP/Getty Images

Though some people might need more of specific vitamins, multivitamins don't help most people, studies say. iStockphoto hide caption

itoggle caption iStockphoto

Michael Robertson, then chief of staff of the Government Services Administration, testifies on Capitol Hill on April 16, 2012. Now chief of staff of the Cabinet Affairs Office in the Obama administration, Robertson has undergone treatment for stage IV colorectal cancer. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

A woman is positioned for a traditional mammogram at Tufts Medical Center in Boston. Bizuayehu Tesfaye/AP hide caption

itoggle caption Bizuayehu Tesfaye/AP

Barbara King rings the "victory bell" and holds up a certificate celebrating her completion of 25 external radiation treatments. Courtesy of Charles Hogg hide caption

itoggle caption Courtesy of Charles Hogg