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Τετάρτη 12 Δεκεμβρίου 2018

The time point of completion thyroidectomy has no prognostic impact in patients with differentiated thyroid cancer

Summary

Background

After partial resection of the thyroid gland a second operation referred to as "completion thyroidectomy" may be required if histopathological analysis indicates the presence of differentiated thyroid cancer (DTC). Although there is little evidence it is assumed that the time point of completion thyroidectomy is not critical for oncological prognosis of patients with DTC. We assessed whether patients with total thyroidectomy (TTx) in a two‐step procedure have an equal long‐term prognosis with regard to disease‐specific survival compared to patients immediately undergoing total thyroidectomy in a one‐step procedure.

Methods

A database study using the Würzburg thyroid cancer database with 2258 patients with pT1a‐pT4b tumours DTC who were operated between 1980 and 2016 was carried out.

Results

277 patients with papillary microcarcinoma pT1aN0M0 were treated by hemithyroidectomy. TTx as one‐step procedure was performed in 1114 patients compared to 867 with TTx as a two‐step procedure. Patients with papillary thyroid cancer more frequently had a TTx as one step procedure than follicular thyroid cancer patients (59.4% vs. 47%; p<0.001). Compared to a one‐step thyroidectomy, overall complication rate was not different compared to patients undergoing a single operation. Multivariate analysis showed that the presence of distant metastases, T‐stage and age at diagnosis were the only independent determinants for DTC‐specific survival, regardless of a one‐ or two‐time thyroidectomy.

Conclusion

The present study on the largest of such patient collectives provides evidence that a delayed completion operation does not affect disease‐specific survival in DTC, nor does it lead to a significant increase in complication rates.

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