[Histonet] RE: New Cap Guidelines for Her2 and ER/PR

Tue Oct 12 11:57:10 CDT 2010

Sorry Jan,

ASCO/CAP Guideline Recommendations for HER2 in Breast Cancer Article
Table 6. Sample Exclusion Criteria to Perform or Interpret a HER2 FISH Assay
Item #3 Tissue fixed for prolonged intervals in formalin (greater than 48 hours)

Teresa Hallada MTCT (ASCP)
MidMichigan Health Gratiot

________________________________

From: histonet-bounces <@t> lists.utsouthwestern.edu on behalf of Mahoney,Janice A
Sent: Tue 10/12/2010 12:05 PM
To: 'Mike Pence'; Joyce Cline; histonet <@t> lists.utsouthwestern.edu
Subject: RE: [Histonet] RE: New Cap Guidelines for Her2 and ER/PR

Formalin fixation time does not impact the results of FISH as it does IHC.
Jan M
Omaha

-----Original Message-----
From: Mike Pence [mailto:mpence <@t> grhs.net]
Sent: Tuesday, October 12, 2010 11:00 AM
To: Mahoney,Janice A; Joyce Cline; histonet <@t> lists.utsouthwestern.edu
Subject: RE: [Histonet] RE: New Cap Guidelines for Her2 and ER/PR

I don't think it matters if you do Her2 by FISH or IHC the time is still
48hr. I hope I am wrong, but I don't think I am.

Mike

-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of
Mahoney,Janice A
Sent: Tuesday, October 12, 2010 10:25 AM
To: 'Joyce Cline'; histonet <@t> lists.utsouthwestern.edu
Subject: [Histonet] RE: New Cap Guidelines for Her2 and ER/PR

We have decided to reflex to FISH those breasts that do not fall within
the recommended formalin fixation time.  We do work on Saturdays so it
is only the rare 3 day weekends that this comes into play. Jan M Omaha

-----Original Message-----
From: histonet-bounces <@t> lists.utsouthwestern.edu
[mailto:histonet-bounces <@t> lists.utsouthwestern.edu] On Behalf Of Joyce
Cline
Sent: Tuesday, October 12, 2010 10:10 AM
To: histonet <@t> lists.utsouthwestern.edu
Subject: [Histonet] New Cap Guidelines for Her2 and ER/PR

Does anyone have any experience with storing formalin fixed breast
tissue in 70% before processing?  I am trying to comply with the new
guidelines set forth by CAP and ASCO with regard to Her2 and ER/PR and
since my lab does not operate on the weekend we have been well above the
48 hour recommended formalin fixation time.  Does 70% affect
antigenicity for either Her2 or ER/PR?  Any information or suggestions
will be greatly appreciated.  Thanks :)

Ronda Souders
Hagerstown Medical Laboratory
301-665-4980
fax 301-665-4941
ronda.souders <@t> wchsys.org<mailto:ronda.souders <@t> wchsys.org>

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