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Association between preoperative thyrotrophin and clinicopathological and aggressive features of papillary thyroid cancer.

Association between preoperative thyrotrophin and clinicopathological and aggressive features of papillary thyroid cancer.
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Tam AA, Ozdemir D, Aydın C, Bestepe N, Ulusoy S, Sungu N, Ersoy R, Cakir B,


Tam AA, Ozdemir D, Aydın C, Bestepe N, Ulusoy S, Sungu N, Ersoy R, Cakir B, (click to view)

Tam AA, Ozdemir D, Aydın C, Bestepe N, Ulusoy S, Sungu N, Ersoy R, Cakir B,

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Endocrine 2018 01 27() doi 10.1007/s12020-018-1523-6

Abstract
PURPOSE
We aimed to investigate the relation between preoperative serum thyrotrophin (TSH) and clinicopathological features in patients with papillary thyroid carcinoma (PTC) and microcarcinoma (PTMC).

METHODS
Patients who underwent thyroidectomy and diagnosed to have benign nodular disease or PTC/PTMC in our clinic were evaluated retrospectively. Patients with a previous history of thyroid surgery, patients using antithyroid medications or thyroid hormone and patients with tumors known to be unresponsive to TSH were excluded.

RESULTS
Data of 1632 patients were analyzed. Histopathological diagnosis was benign in 969 (59.4%) and malignant in 663 (40.6%) patients. Preoperative median serum TSH was significantly higher in malignant compared to benign group (1.41 IU/dL vs. 0.98 IU/dL, p < 0.001). Malignancy risk increased gradually as going from hyperthyroidism to euthyroidism and hypothyroidism (20, 40.6, and 59.1%, respectively, p < 0.05). Serum TSH was lowest in benign nodular disease, higher in PTMC and highest in PTC (p < 0.001). This was also true when patients with positive antithyroid peroxidase/antithyroglobulin and with lymphocytic thyroiditis were excluded from the analysis (p < 0.001). Serum TSH was higher in patients with bilateral tumor, capsular invasion and lymph node metastasis (LNM) compared to patients with unilateral tumor, without capsule invasion and without LNM, respectively (p = 0.036, p = 0.002, and p = 0.001, respectively). Patients with aggressive variant PTC had higher serum TSH than nonaggressive ones (p < 0.05). CONCLUSION
Preoperative serum TSH is associated with PTMC, PTC and LNM. Serum TSH seems to be related with thyroid cancer regardless of autoimmunity. With the present study, for the first time, we showed an association between serum TSH and aggressive variants of PTC.

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