Serum TSH levels as a predictor of malignancy in thyroid nodules: A prospective study

The role of serum TSH concentrations as a predictor of malignancy of thyroid nodule remains unclear. To prospectively evaluate the usefulness of serum TSH levels as a predictor of malignancy in thyroid nodules. Patients with thyroid nodule(s) who underwent fine-needle aspiration biopsy under ultraso...

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Veröffentlicht in:PloS one 2017-11, Vol.12 (11), p.e0188123-e0188123
Hauptverfasser: Golbert, Lenara, de Cristo, Ana Patrícia, Faccin, Carlo Sasso, Farenzena, Mauricio, Folgierini, Heloísa, Graudenz, Marcia Silveira, Maia, Ana Luiza
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container_issue 11
container_start_page e0188123
container_title PloS one
container_volume 12
creator Golbert, Lenara
de Cristo, Ana Patrícia
Faccin, Carlo Sasso
Farenzena, Mauricio
Folgierini, Heloísa
Graudenz, Marcia Silveira
Maia, Ana Luiza
description The role of serum TSH concentrations as a predictor of malignancy of thyroid nodule remains unclear. To prospectively evaluate the usefulness of serum TSH levels as a predictor of malignancy in thyroid nodules. Patients with thyroid nodule(s) who underwent fine-needle aspiration biopsy under ultrasonographic guidance in a tertiary, university-based hospital were consecutively evaluated. Patients with known thyroid cancer and/or patients receiving thyroid medication were excluded. Serum TSH levels were measured by two differents methodologies, chemiluminescent (CLIA) and electrochemiluminscent immunoassay (ECLIA). Anatomopathological exam of tissue samples obtained at thyroidectomy was considered the gold standard for the diagnosis of thyroid cancer. A total of 615 patients participated in the study. The mean age was 55.9±14.7 years, and 544(88.5%) were female. The median TSH values were 1.48 and 1.55 μU/mL, using CLIA and ECLIA, respectively. One-hundred-sixty patients underwent thyroidectomy and the final diagnoses were malignant in 47(29.4%) patients. TSH levels were higher in patients with malignant than in those with benign nodules in both TSH assays: 2.25 vs. 1.50; P = 0.04 (CLIA) and 2.33 vs. 1.27; P = 0.03 (ECLIA). Further analysis using binary logistic regression identified elevated TSH levels, a family history of thyroid cancer, the presence of microcalcifications, and solitary nodule on US as independent risk factors for malignancy in patients with thyroid nodules. Additional analyses using TSH levels as a categorical variable, defined by ROC curve analysis, showed that the risk of malignancy was approximately 3-fold higher in patients with TSH levels ≥2.26 μU/mL than in patients with lower TSH levels (P = 0.00). Higher serum TSH levels are associated with an increased risk of thyroid cancer in patients with thyroid nodules. Using TSH levels as an adjunctive diagnostic test for stratifying the risk of malignancy associated with a thyroid nodule may help on defining the best therapeutic approaches.
doi_str_mv 10.1371/journal.pone.0188123
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To prospectively evaluate the usefulness of serum TSH levels as a predictor of malignancy in thyroid nodules. Patients with thyroid nodule(s) who underwent fine-needle aspiration biopsy under ultrasonographic guidance in a tertiary, university-based hospital were consecutively evaluated. Patients with known thyroid cancer and/or patients receiving thyroid medication were excluded. Serum TSH levels were measured by two differents methodologies, chemiluminescent (CLIA) and electrochemiluminscent immunoassay (ECLIA). Anatomopathological exam of tissue samples obtained at thyroidectomy was considered the gold standard for the diagnosis of thyroid cancer. A total of 615 patients participated in the study. The mean age was 55.9±14.7 years, and 544(88.5%) were female. The median TSH values were 1.48 and 1.55 μU/mL, using CLIA and ECLIA, respectively. One-hundred-sixty patients underwent thyroidectomy and the final diagnoses were malignant in 47(29.4%) patients. 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To prospectively evaluate the usefulness of serum TSH levels as a predictor of malignancy in thyroid nodules. Patients with thyroid nodule(s) who underwent fine-needle aspiration biopsy under ultrasonographic guidance in a tertiary, university-based hospital were consecutively evaluated. Patients with known thyroid cancer and/or patients receiving thyroid medication were excluded. Serum TSH levels were measured by two differents methodologies, chemiluminescent (CLIA) and electrochemiluminscent immunoassay (ECLIA). Anatomopathological exam of tissue samples obtained at thyroidectomy was considered the gold standard for the diagnosis of thyroid cancer. A total of 615 patients participated in the study. The mean age was 55.9±14.7 years, and 544(88.5%) were female. The median TSH values were 1.48 and 1.55 μU/mL, using CLIA and ECLIA, respectively. One-hundred-sixty patients underwent thyroidectomy and the final diagnoses were malignant in 47(29.4%) patients. TSH levels were higher in patients with malignant than in those with benign nodules in both TSH assays: 2.25 vs. 1.50; P = 0.04 (CLIA) and 2.33 vs. 1.27; P = 0.03 (ECLIA). Further analysis using binary logistic regression identified elevated TSH levels, a family history of thyroid cancer, the presence of microcalcifications, and solitary nodule on US as independent risk factors for malignancy in patients with thyroid nodules. Additional analyses using TSH levels as a categorical variable, defined by ROC curve analysis, showed that the risk of malignancy was approximately 3-fold higher in patients with TSH levels ≥2.26 μU/mL than in patients with lower TSH levels (P = 0.00). Higher serum TSH levels are associated with an increased risk of thyroid cancer in patients with thyroid nodules. Using TSH levels as an adjunctive diagnostic test for stratifying the risk of malignancy associated with a thyroid nodule may help on defining the best therapeutic approaches.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>29145466</pmid><doi>10.1371/journal.pone.0188123</doi><tpages>e0188123</tpages><oa>free_for_read</oa></addata></record>
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subjects Adult
Aged
Analysis
Biology and Life Sciences
Biomarkers, Tumor - blood
Biopsy
Cancer
Cellular biology
Chemiluminescence
Diagnosis
Diagnostic systems
Drugs
Female
Gene expression
Genetics
Health aspects
Health risks
Humans
Immunoassay
Internet
Iodine
Male
Malignancy
Medical diagnosis
Medical research
Medicine and Health Sciences
Middle Aged
Mutation
Nodules
Patients
Physical Sciences
Prospective Studies
Regression analysis
Research and Analysis Methods
Risk analysis
Risk factors
Studies
Thyroid
Thyroid cancer
Thyroid Neoplasms - blood
Thyroid Neoplasms - diagnosis
Thyroid-stimulating hormone
Thyroidectomy
Thyrotropin - blood
Ultrasonic imaging
title Serum TSH levels as a predictor of malignancy in thyroid nodules: A prospective study
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