David2 - cervical radiation exposure is a well documented cause of poly radiculopathy. Obviously everything in your body is down stream from that part of your spinal cord, and peripheral neuropathy is the first thing people notice. But the problem is that only recently did we have oral cancer patients with head and neck radiation living as long as they are (because of their HPV etiology and its 30% survival advantage). So most of the radiation oncology people, and neurology people are not aware this is happening, and know little about it. Your EMG test will show what is occurring, people that do not understand this causation will call it idiopathic. You may start to notice in leg muscles and other places you can see small patterns of twitches in the muscle when relaxed. These tiny nerves firing randomly in a pattern around your muscle are called florid fasciculations. They are seen commonly in people developing motor neuron diseases, and are very typical of ALS. (Don't let anyone down the road misdiagnose you with that based on any of this.) A MRI of the whole spine will initially show fibrotic tissues surrounding the actual spinal cord itself, and that fibrosis is the initial problem. Please continue to post about your experiences here as I am trying to collect enough patients to get a paper done about this, so that we can expose the treating medical community to the knowledge, and hopefully get better IMRT mapping near the cord to eliminate this issue in future patients when possible.