[Histonet] Re: Paraffin Blocks

[Bernice Frederick]

All
We are a tissue bank and heavily involved with clinical trials. We are
trying to find a way for people to flag cases on these trials that have
consented to future use so that when it comes time for block disposal,those
blocks are kept or sent to the appropriate group that ran and or banks the
tissue for that trial. We have translational studies as far back as 1990
that I ma afraid the rest of the case is gone.
Bernice


Bernice Frederick HTL (ASCP)
Northwestern University
Pathology Core Facility
ECOGPCO-RL 
710 N Fairbanks Court
Olson 8-421
Chicago,IL 60611
312-503-3723


-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of Weems, Joyce
Sent: Thursday, February 05, 2009 5:13 PM
To: Robert Richmond; histonet <@t> lists.utsouthwestern.edu
Subject: RE: [Histonet] Re: Paraffin Blocks

I've been preaching this sermon for several years!!!  We must do
something!!!  j


-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of Robert
Richmond
Sent: Thursday, February 05, 2009 5:28 PM
To: histonet <@t> lists.utsouthwestern.edu
Subject: [Histonet] Re: Paraffin Blocks

How long to retain paraffin blocks (human tissue) is an issue that's
going to need re-thinking.

Presently most pathology services in the USA retain them for no more
than ten years. If the laboratory closes, slides and blocks are disposed
of immediately.

It seems to me that in the coming age of molecular pathology, there will
be a lot more interest in recovering paraffin blocks after longer
periods of time. I think that the regulatory agencies will soon need to
address this problem.

Storing present-day paraffin blocks, with their bulky plastic mounts and
low-melting waxes, is going to become even more difficult than it is
now, as hospitals and other facilities consider the cost of maintaining
and cooling storage space.

I don't think it's possible to triage blocks and slides for disposal at
the time the case is signed out. It sounds like a good idea, but the few
times I've seen it tried it didn't work. Also, we really don't know what
we're going to need to recover in the future.

Bob Richmond
Samurai Pathologist (nearly 70, isn't going to have to worry about this
problem) Knoxville TN

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