Routine marker testing and recurrence... worth it?

[AlaskaAngel]

The debate has been difficult at times, but the issue is one that is hard to understand. I think it is worthwhile.

I don't know what criteria the people used who created this particular guideline, but it is hard for me to agree that this guideline would provide more help than horror for those who are continuing on difficult, uncomfortable, expensive treatments that they are hoping are keeping them NED throughout the time that markers might have helped them to know that what they were doing wasn't helpful. If I read your argument correctly, these patients are better off kept in the dark based on the judgment of the people designing the guideline (who are not, after all, the ones directly dealing with cancer themselves). This guideline then would be based primarily on extending survival and not at all on QOL, since obviously QOL is worsened in this case by being kept in the dark. It seems like they are somehow measuring the value of hope against the hardships of treatment, and how do they manage to do that with any accuracy?

I also think the perceptions about doing markers would be somewhat different depending on whether the guideline is intended to address the UNreasonableness of doing routine markers for everyone who has had bc -- for example, including those diagnosed at early stage whose labs and all other indicators are wonderful and who have been NED from the getgo -- versus those at the other end of the scale, those who have recurred once and are NED. If the guidelines are meant to say that those who have recurred but are NED don't benefit from routine markers, then we do disagree. The guidelines discourage the routine use of markers, but don't say not to use markers altogether. But what would be the guideline definition of the non-routine use for markers?

A.A.

[dlaxague]

Sorry, AA, I rambled and got off the actual topic, which is follow up after primary breast cancer. The guidelines I've been referencing address only follow up after primary breast cancer. The studies on which the guidelines are based, as Margerie confirmed when she got access to that "uptodate" summary, do claim equal QOL for those not doing TM's as part of primary follow up.

The rest was conversation and thinking-aloud, although as I said, it's a valid conversation and some women and providers prefer that style of management after recurrence, for the reasons that I stated.

I think that the option of using markers for follow up after a distant recurrence is considered standard of care, although not all oncologists use them for all patients, for various reasons (they don't work for that patient, the oncologist prefers scans, etc). And they are not stand-alone. They are used as one piece of the puzzle that would include scans and symptoms.

Debbie

[Lani]

hot off the press is all I will add for now

J Clin Oncol. 2007 Oct 22; [Epub ahead of print]
American Society of Clinical Oncology 2007 Update of Recommendations for the Use of Tumor Markers in Breast Cancer.

Harris L, Fritsche H, Mennel R, Norton L, Ravdin P, Taube S, Somerfield MR, Hayes DF, Bast RC Jr.
Yale Cancer Center, Yale University, New Haven, CT; M.D. Anderson Cancer Center, Houston; Texas Oncology PA, Dallas, TX; Memorial Sloan-Kettering Cancer Center, New York, NY; National Cancer Institute, Bethesda, MD; American Society of Clinical Oncology, Alexandria, VA; University of Michigan Medical Center, Ann Arbor, MI.
PURPOSE: To update the recommendations for the use of tumor marker tests in the prevention, screening, treatment, and surveillance of breast cancer. METHODS: For the 2007 update, an Update Committee composed of members from the full Panel was formed to complete the review and analysis of data published since 1999. Computerized literature searches of MEDLINE and the Cochrane Collaboration Library were performed. The Update Committee's literature review focused attention on available systematic reviews and metaanalyses of published tumor marker studies. In general, significant health outcomes (overall survival, disease-free survival, quality of life, lesser toxicity, and cost-effectiveness) were used for making recommendations. Recommendations and CONCLUSIONS: Thirteen categories of breast tumor markers were considered, six of which were new for the guideline. The following categories showed evidence of clinical utility and were recommended for use in practice: CA 15-3, CA 27.29, carcinoembryonic antigen, estrogen receptor, progesterone receptor, human epidermal growth factor receptor 2, urokinase plasminogen activator, plasminogen activator inhibitor 1, and certain multiparameter gene expression assays. Not all applications for these markers were supported, however. The following categories demonstrated insufficient evidence to support routine use in clinical practice: DNA/ploidy by flow cytometry, p53, cathepsin D, cyclin E, proteomics, certain multiparameter assays, detection of bone marrow micrometastases, and circulating tumor cells.
PMID: 17954709 [PubMed - as supplied by publisher]