Looking for some advise.  Thought that may be someone out there in
histoland has tried and been successful or at least could say what not to
do.

I've been given a number of specimens for immunostaining.  Several of them
have been stored refrigerated in paraformaldehyde for years.  These are all
human laryngeal tissues and therefore valuable.  Any suggestions as to
treatments would be appreciated.  I know I haven't given many details as to
what I will be looking for in these tissues.  It will be mainly
neuropeptides and vascular components.