The guidelines for Endocrinologists show some information on heterophilic antibodies interfering with immunoassays, but little is written on contrast for imaging interfering with an immunoassay. Most Doctors are not aware that CT contrast could have an effect upon the labs used for deciding treatment or outcome.
Carol Corbitt
I can find no case reports on this situation. Many Medullary patients are asked to have labs drawn after imaging. As far out as three months, a confirmed case of secondary interference of an unknown origin that has been contributed to CT iodine contrast with Calcitonin Immunoassay.
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