An oncologist contacted the laboratory to ask if our standard estradiol immunoassay was appropriate to monitor her breast cancer patients who are on an aromatase inhibitor. What should I say?

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Joely Straseski, PhD, DABCC
Professor of Pathology
University of Utah School of Medicine
Section Chief, Clinical Chemistry
Medical Director, Endocrinology
ARUP Laboratories
Salt Lake City, Utah
Member, CAP Accuracy-Based Programs Committee

Editor: Frederick L. Kiechle, MD, PhD