--here's an interesting summary article that was done:

http://jama.ama-assn.org/cgi/content...ct/273/23/1865

It's not very specific, though, which is why the following may help:

http://autoimmunedisease.suite101.co...m/ivig_therapy

http://www.pemphigus.org/content/view/52/52/

This one is only a wiki summary, but it does point to a number of links:

http://www.answers.com/topic/intravenous-immunoglobulin


Most of the recent literature in this area has been talking about "off-label" usage of IVIg as greatly contribtuing to the recent shortage of the product, In actuality, IVIg was being used quite commonly "off-label" for many years before the shortage; it's probable that IVIg has been used more commonly "off-label" than for specifically indicated conditions for at least a decade, due to a considerable body of anecdotal case studies that showed it effective for some across a wide range of conditions.

I'm sure that some of the real IVIg experts here will come on with more detailed info (most of my knowledge of it comes through discussion of its uses/efficacy with the neuros at Cornell-Weill, who are big advocates of its use for suspected immune-mediated neuropathies).