IVIG (immunogammaglobulin therapy) to treat neuropathy

Has anyone tried or had any positive results using IVIG therapy to treat neuropathy? My 77 year old mother was diagnosed with stage 3 ovarian cancer and subsequently had a complete hysterectomy and a 6 cycle course of Taxol and Carboplatin which finished in mid-August. Since then she has been taking a chemo pill (Cyclophosphamide) and just last week developed a tremor in her left leg which makes her unable to walk more than 3 feet without falling. She was admitted to the hospital and after numerous tests a Cat Scan, MRI of spine and head and an ambulatory EEG, they have not been able to find anything. She is now in a Rehab hospital which is preparing her to adjust to life in a wheel chair. The only thing she was given to combat neuropathy during chemo was Glutamine Powder (which she is currently taking 1/4 tsp per day.l