Re: Sat. Aqueous Picric Acid in place of Bouins -Reply
|From:||"J. A. Kiernan" <email@example.com>|
On Fri, 18 May 2001, Tony Henwood wrote:
> The best thing to do is run your existing technique in parallel with the
> modified using aqueous picric acid. Use mirror sections, possibly kidney,
> liver, tongue and intestine, and compare the results. Record in the lab's
> development notebook and that should satisfy the accreditors.
Tony H is quite right. That's what you should do.
> A few days ago there was a discussion about use of Bouins and John
> Kiernan sent a post saying that it was not necessary to use Bouins
> (for the Masson Trichrome) when a Sat aqueous picric acid solution
> works just as well. Is this documented somewhere? If I change the
> written procedure I'd like to include a reference.
I have compared Bouin with Picric-alone in the context of trichrome
staining but have not published anything about it. This was part of
a study (still incomplete) of the AZAN method. It will get submitted
to a journal as a few lines in some longer paper in the next year
or two, and will be published if the referees say it's OK. Until
then, my word is just a "personal communication" (= worthless).
Your words, if you follow Tony Henwood's advice, will amount to
a proper record of a controlled comparison of pre-treatments.
Masson's name is attached to several methods that use dyes that are
different (in chemistry and colour) from those originally prescribed
by Masson himself (who was a pathologist in Montreal and wrote a
great big book about tumours). The major difference between Masson
and its variants and the technically simpler Mallory method is the
prior staining of nuclei with an iron-haematoxylin. With Mallory and
AZAN the nuclei are stained by the same red dye that colours cytoplasm.
John A. Kiernan
Department of Anatomy & Cell Biology
The University of Western Ontario
London, Canada N6A 5C1
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