[Histonet] Trichrome staining and fibrin

[Bryan Hewlett]

Timo,

Try the Lendrum MSB trichrome variant, it was designed to demonstrate 
fibrin.
I will send the method via a separate e-mail.

Bryan

----- Original Message ----- 
From: "Timo Väisänen" <timo.vaisanen <@t> oulu.fi>
To: <histonet <@t> lists.utsouthwestern.edu>
Sent: Tuesday, June 13, 2006 10:33 AM
Subject: [Histonet] Trichrome staining and fibrin


> Hello all,
>
> I have struggled with getting Masson Trichrome (Goldner) staining to work 
> with
> kidney biopsies. The problem is that our pathologist does not get positive
> fibrin staining to glomeruli in diseased kidneys. Those areas of the 
> glomeruli
> that should contain fibrin, at least according to the pathologist, are 
> green
> (Lichtgrun) and not red, as they should be, whatever I do. I have tried to
> enhance the staining with Bouin's fixative (+56C) pretreatment but it did 
> not
> change the overall situation. However, the red stain was more intense in 
> skin
> samples containing fibrin (formalin fixed). I have also tried another 
> Trichrome
> staining with Crocein Scarlet 7B without any luck. In our lab kidney 
> biopsies
> are routinely fixed with alcoholic Bouin's. As far as I know it should be
> compatible with the Masson protocol we use. Any ideas? Any good protocols 
> that
> I could try?
>
> Thank's in advance,
>
> Timo
>
>
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