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sometimes it can be a long wait to talk to a neurologist.
thanks for including the EMG report. no evidence of myopathy means no evidence of muscle tissue disease.
I suspect you have severe osteoarthritis in your lower back lumbar spine pressing on nerves exiting your spinal canal causing pain
an MRI scan of your lumbar spine with contrast would confirm this.
closed MRI scanners are better than open MRI scan machines.
ask for a 3.0 tesla high definition MRI scan of your spine with contrast
have you had a spine MRI scan before?
creatinine kinase elevation most often is due to muscle breakdown and this can be due to severe muscle pain or even myositis muscle inflammation from pinched nerves in your back possibly.
severe abdominal pain can also be from diverticulosis or partial small bowel obstruction. both of which can cause severe abdominal pains.
constipation can often worsen and cause diverticulosis attacks.
if you have had prior abdominal surgery before, this can put you at risks for scar tissue in your abdomen causing partial small bowel obstruction.