Hi Georgia,
I read with interest your e-mail because my sister, a dialysis patient, recently had IVIG treatments and my husband is an EC Stage 3 survivor of 16 months.
Regarding the IVIG, my sister's was used to reduce antibodies her body developed due to a prior unsuccessful kidney transplant 14 years ago and several blood transfusions over the years. These antibodies make her high sensitized which means that she would have a hard time keeping a kidney when, and if, one becomes available unless it is a perfect match. Unfortunately, the IVIG didn't work for her.
I'm guessing that your mom probably didn't have much lymph node involvement if it is Stage 2b? How old is you Mom and how is her health? My husband had the surgery in March 2008 followed by chemo and so far everything has been fine. He did have a difficult time with the chemo.
I wish I could be of more help. Good luck.
Maria