Endocrinol Metab.  2019 Jun;34(2):150-157. 10.3803/EnM.2019.34.2.150.

Postoperative Thyroid-Stimulating Hormone Levels Did Not Affect Recurrence after Thyroid Lobectomy in Patients with Papillary Thyroid Cancer

Affiliations
  • 1Department of Otorhinolaryngology-Head and Neck Surgery, Korea Cancer Center Hospital, Seoul, Korea.
  • 2Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea. chorong24@gmail.com
  • 3Department of Internal Medicine, Healthcare Research Institute, Seoul National University Hospital Healthcare System Gangnam Center, Seoul National University College of Medicine, Seoul, Korea.
  • 4Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Korea. hoonsung80@gmail.com

Abstract

BACKGROUND
Thyroid-stimulating hormone (TSH) suppression is recommended for patients who undergo thyroidectomy for differentiated thyroid cancer (DTC). However, the impact of TSH suppression on clinical outcomes in low-risk DTC remains uncertain. Therefore, we investigated the effects of postoperative TSH levels on recurrence in patients with low-risk DTC after thyroid lobectomy.
METHODS
Patients (n=1,528) who underwent thyroid lobectomy for papillary thyroid carcinoma between 2000 and 2012 were included in this study. According to the mean and dominant TSH values during the entire follow-up period or 5 years, patients were divided into four groups (<0.5, 0.5 to 1.9, 2.0 to 4.4, and ≥4.5 mIU/L). Recurrence-free survival was compared among the groups.
RESULTS
During the 5.6 years of follow-up, 21 patients (1.4%) experienced recurrence. Mean TSH levels were within the recommended low-normal range (0.5 to 1.9 mIU/L) during the total follow-up period or 5 years in 38.1% or 36.0% of patients. The mean and dominant TSH values did not affect recurrence-free survival. Adjustment for other risk factors did not alter the results.
CONCLUSION
Serum TSH levels did not affect short-term recurrence in patients with low-risk DTC after thyroid lobectomy. TSH suppression should be conducted more selectively.

Keyword

Thyroid cancer, papillary; Recurrence; Thyroid neoplasms; Thyrotropin

MeSH Terms

Follow-Up Studies
Humans
Recurrence*
Risk Factors
Thyroid Gland*
Thyroid Neoplasms*
Thyroidectomy
Thyrotropin*
Thyrotropin
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