the effect of levothyroxine discontinuation timing on postoperative hypothyroidism after hemithyroidectomy for papillary thyroid microcarcinoma
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ID: 192280
2016
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Abstract
Objective. No previous studies regarding the appropriate timing of thyroid hormone discontinuation after hemithyroidectomy have been published. This study aimed to identify the appropriate timing for levothyroxine discontinuation after hemithyroidectomy among patients with papillary thyroid microcarcinoma (PTMC). Methods. This study retrospectively evaluated 304 patients who underwent ≥1 attempt to discontinue levothyroxine after hemithyroidectomy for treating PTMC between January 2008 and December 2013. Fifty-three patients were excluded because of preoperative hypothyroidism or hyperthyroidism, a history of thyroid hormone or antithyroid therapy, no available serological data, or a postoperative follow-up of <24 months. We evaluated the associations of successful levothyroxine discontinuation with patient age, sex, preoperative serological data, underlying thyroid gland histopathology, anteroposterior diameter of the residual thyroid gland, number of discontinuation attempts, and initial discontinuation timing. Results. Among the 251 included patients, 125 patients (49.8%) achieved successful levothyroxine discontinuation during the follow-up period after hemithyroidectomy. There was a significant difference in the outcomes for patients who underwent an initial discontinuation attempt at ≤3 months and ≥4 months after hemithyroidectomy (p < 0.001). There were significant differences in the discontinuation outcomes according to underlying thyroid histopathology (p = 0.001), preoperative thyroid-stimulating hormone levels (p < 0.001), and number of discontinuation attempts (p < 0.001). Conclusions. Among patients with PTMC, the initial levothyroxine discontinuation attempt is recommended at ≥4 months after hemithyroidectomy.
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| Reference Key |
ha2016internationalthe
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|---|---|
| Authors | ;Tae Kwun Ha;Dong Wook Kim;Ha Kyoung Park;Jin Wook Baek;Yoo Jin Lee;Young Mi Park;Do Hun Kim;Soo Jin Jung;Ki Jung Ahn |
| Journal | zhonghua wei zhong bing ji jiu yi xue |
| Year | 2016 |
| DOI |
10.1155/2016/3240727
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| URL | |
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