CNN Anderson Cooper 360 February 12, 2014 06:31:00
Sometimes is bone pain or back pain specifically. they get little lesions in the bone, for example on somebody's skull. but those punched out lesions tend to cause pain. and that's what somebody typically goes to the doctor for. they may not have any other symptoms. but they may eventually develop fatigue, may develop sort of more profound symptoms as time goes on. but if it's early he could be doing just fine. >> is it known what causes multiple myeloma? >> they don't know for sure. there's been all sorts of theories on this. some people believe there's a genetic glitch in people. it's sort o...