Could be your: Kidney, pancreas, lungs, spinal nerves, etc... Explore further...Also the tests you went thought are not enough to rule out your potential heart problems. The best option is multifunction cardiogram. http://en.m.wikipedia.org/wiki/multifunction_cardiogram wishing you the best luck!
Answered 3/25/2013
5.2k views
Unlikely: The chest x-ray would show something in the case of cancer. In middle age back pain is usually related to the spine and muscles. Discuss your concerns with your physician.
Answered 3/26/2013
5.2k views
Very unlikely: There are many other much more likely causes.
Answered 9/28/2016
5.2k views
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