How many rectal cancer people out there have the chronic lower back pain? What IS it? Is lack of muscles from weight loss? Bad posture from numb feet? My friend's last MRI scan of spine turned out to show no cancer in his bones so that is not it. I'm perplexed. He's miserble and getting weaker each day. I'm taking him to an accupunturist. I would love to have some feedback from others suffering from this and any clues on remedies. Thanks!