Hello - thanks for your patience.
Radiating pain is suggestive of a
nerveNerve biopsy
Nerve conduction velocity, or neuropathic type pain. The neurologist has already performed comprehensive testing including EMG and MRIs. She is already on a strong dose of
neurontin, which is used to help neuropathic pain.
With the blood test, make sure the following has been tested: complete blood count, erythrocyte sedimentation rate (ESR), thyroid stimulating hormone (TSH), serum protein electrophoresis (SPEP), blood glucose, vitamin B12 concentration, antinuclear antibody, and urinalysis.
Other tests for nerve pain would be a nerve biopsy - which can be considered by the neurologist.
The only infection that I am aware of that can lead to such pain would be herpes zoster. Make sure that this has been considered.
If the neurology workup continues to be negative, you may want to consider a rheumatology referral - although I think that that avenue may be of low yield. A referral to a pain clinic or physiatrist can be considered to help manage the discomfort.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.
Happy holidays,
Kevin, M.D.