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Hi Eleanor. The cervical spine controls the head, neck and arms. The encroachment on the left at C5/6 might give you some problems in the left upper arm such as pain, tingling, weakness, but is nothing to worry about in general. It can be followed and surgically corrected if it were to become severe. It would not explain symptoms in your legs. This could be from spinal stenosis or encroachment of the nerve roots in the lumbar (lower) spine, so an mRI there might also be helpful. You should also consider a possible vascular cause such as claudication. Sometimes this can also be fixed by bypassing any obstuctions in the arteries to the legs. You should also ask for a work up for a rheumatologic cause (e.g. Raynaud's, arteritis) or a referral to a rheumatologist, as this type of problem can usually be treated and/or managed as well.