[Histonet] How long ...

[Massimo]

I found into a shelf of the laboratory a small flask containing mouse samples 
fixed in Bouin's fluid and preserved in ethanol at 70°, forgotten there for a 
few years.
I wonder if it would be possible to continue the process up to paraffin 
embedding for histological preparations.
Some time ago a professor of biology at the University of Florence told me that 
they could remain in alcohol for years, but on literature I found that the time 
can not be so long without altering tissues.
Has anyone had a similar experience?
It's better to throw everything away or not?
Thank you in advance.

Kind Regards,

Massimo