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J Clin Pathol 2009;62:547-551 doi:10.1136/jcp.2008.063446
  • Original article

Call for a European programme in external quality assurance for bone marrow immunohistochemistry; report of a European Bone Marrow Working Group pilot study

  1. E E Torlakovic1,
  2. K Naresh2,
  3. M Kremer3,
  4. J van der Walt4,
  5. E Hyjek5,
  6. A Porwit6
  1. 1
    Department of Pathology and Laboratory Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
  2. 2
    Department of Histopathology, Hammersmith Hospital and Imperial College, London, UK
  3. 3
    Institute of Pathology, Technical University of Munich, Munich, Germany
  4. 4
    Department of Histopathology, St Thomas’ Hospital, London, UK
  5. 5
    Department of Pathology, The University of Chicago, Chicago, Illinois, USA
  6. 6
    Department of Pathology, Karolinska University Hospital, Stockholm, Sweden
  1. Dr E E Torlakovic, Department of Pathology and Laboratory Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon S7N 0W8, Saskatchewan, Canada; emina.torlakovic{at}usask.ca
  • Accepted 23 January 2009

Abstract

Background and Aims: In diagnostic immunohistochemistry (IHC), daily quality control/quality assurance measures (QC/QA) and participation in external quality assurance programmes (EQA) are important in ensuring good laboratory practice and patient care. Bone marrow trephine biopsies (BMTB) have been generally excluded from EQA programmes for diagnostic IHC due to a lack of standards for tissue processing. The European Bone Marrow Working Group (EBMWG) has set up an EBMWG IHC Committee with the task of exploring the plausibility of an EQA programme for BMTB IHC in Europe.

Methods: 28 laboratories participated in a web-based anonymous survey; 19 laboratories submitted a total of 109 slides stained for CD34, CD117, CD20, CD3, Ki-67 and a megakaryocyte marker of choice.

Results: Eight different fixatives and nine different decalcification methods were used. While 93% of participants believed that they produced excellent results in BMTB IHC, only 4/19 (21%) laboratories did not have any poor results. CD117 and Ki-67, with 53% and 50% poor results, respectively, were the most problematic immunostains, while CD20 was the least problematic, with only 11% poor results.

Conclusions: The EBMWG IHC Committee calls for a reduction in the tissue processing methods for BMTB and establishment of an EQA programme for BMTB IHC to help diagnostic IHC laboratories calibrate their tests according to expert recommendations. This is especially necessary in the light of recent introduction of predictive IHC tests in BMTB.

Footnotes

  • Competing interests: None.

Responses to this article

  • Response from authors
    • Emina A Torlakovic,
    • Kikkeri Naresh, Marcus Kremer, Jon van der Walt, Elizabeth Hyjek, Anna Porwit,
    J Clin Pathol published online August 6, 2009
  • External QA for bone marrow biopsies. Why is there such a need?
    • Attilio Orazi
    J Clin Pathol published online August 4, 2009

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