It is possible for advanced liver disease to lead to polyneuropathy.
However, with all the tests you have had - including a liver biopsy as well as other imaging studies, this is not a likely possibility.
I agree with the neurology referrals. I would also ensure that basic tests like B-12 deficiency and thyroid function was tested for.
If the neurology approach is not helping, a rheumatology referral can be considered, looking for diseases like myositis or lupus.
These options can be discussed with your personal physician.
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.
Kevin, M.D.
kevinmd_