Comparison of serum calcitonin and procalcitonin in detecting medullary thyroid carcinoma among patients with thyroid nodules
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Luca Giovanella
, Frederik A. Verburg
Abstract
Background: To prospectively evaluate the role of procalcitonin (PCT) in detecting or excluding medullary thyroid carcinoma (MTC) among patients with thyroid nodules and increased calcitonin (CT) levels.
Methods: Fourteen of 1236 patients referred for thyroid nodules had increased serum CT >10 pg/mL. A stimulation test with pentagastrin was done and both CT and PCT were measured after stimulation. All patients underwent thyroid ultrasound, fine-needle cytology and, if indicated, surgery with histological and immunohistochemical examination of the surgical specimens.
Results: After follow-up, two MTCs were found. These two patients had basal CT >100 pg/mL and detectable (>0.1 ng/mL) PCT, with 100% sensitivity. Pentagastrin stimulated CT achieved values above 100 pg/mL in two MTCs and in other two cases with no MTC outcome (50% PPV and 83% NPV). On the contrary, all patients with no MTC had both basal and stimulated undetectable PCT (100% PPV and 100% NPV).
Conclusions: The addition of basal PCT measurement in patients with thyroid nodule(s) and increased CT may significantly improve accuracy of CT measurement without needing a PG stimulation test.
Conflict of interest statement
Authors’ conflict of interest disclosure: The authors stated that there are no conflicts of interest regarding the publication of this article.
Research funding: None declared.
Employment or leadership: None declared.
Honorarium: None declared.
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Artikel in diesem Heft
- Masthead
- Masthead
- Editorials
- Biomarkers in the treatment of cancer: opportunities and pitfalls
- Multicenter reference intervals studies: a promising perspective for the future?
- Hemolysis-resistant reagent: another part of the puzzle for preventing errors in laboratory testing
- Review
- Exhaled breath condensate: a comprehensive update
- Mini Review
- Psoriasis, a new challenge for laboratory medicine
- Opinion Paper
- CA 19-9: handle with care
- General Clinical Chemistry and Laboratory Medicine
- Performance evaluation of human cytokines profiles obtained by various multiplexed-based technologies underlines a need for standardization
- The iron regulatory hormone hepcidin is decreased in pregnancy: a prospective longitudinal study
- Red blood cell distribution width is a potential prognostic index for liver disease
- Development of a novel, hemolysis-resistant reagent for assessment of α-amylase in biological fluids
- Performance of cassette-based blood gas analyzers to monitor blood glucose and lactate levels in a surgical intensive care setting
- Reference Values and Biological Variations
- The Asian project for collaborative derivation of reference intervals: (1) strategy and major results of standardized analytes
- The Asian project for collaborative derivation of reference intervals: (2) results of non-standardized analytes and transference of reference intervals to the participating laboratories on the basis of cross-comparison of test results
- Cancer Diagnostics
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- Glycoproteomic identification of potential glycoprotein biomarkers in ovarian cancer proximal fluids
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- Serum HER-2 predicts response and resistance to trastuzumab treatment in breast cancer
- Elevated tumor markers in patients with pulmonary alveolar proteinosis
- Serum carcinoembryonic antigen is associated with non-alcoholic fatty liver disease in healthy Korean non-smokers
- Assessment of SOX17 DNA methylation in cell free DNA from patients with operable gastric cancer. Association with prognostic variables and survival
- Sensitivity of CA 15-3, CEA and serum HER2 in the early detection of recurrence of breast cancer
- Cardiovascular Diseases
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- Infectious Diseases
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- Adding calcium to EDTA plasma samples prior to analysis could solve the compatibility issue in commercially available ELISAs that are standardized for serum
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- Standardize the serum albumin assay now: calibrate it to 60% of the serum total protein assay
- Interference of M-paraprotein in automated urea assays
- A case of mistaken diagnosis of heparin-induced thrombocytopenia due to pseudothrombocytopenia
- Delta check: a must in the management of hyponatremia
- A novel cost effective algorithm for antinuclear antibody (ANA) testing in an outpatient setting