the nerve conduction study would suggest the need for mri. The question is 'where'is the problem. is it spinal or more distal in the legs themselves? the emg (nerve study) can locate the area of compromise. this would eliminate unnecessary radiation to your daughter if the problem is not in the spine. Short hamstrings etc which I am sure your surgeon is looking for would not require mri. She may end up with the mri, but as the mother I would want to be darn sure we needed to go that route before I irradiated my child.
best wishes
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DrStephanie
