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Published in: Langenbeck's Archives of Surgery 1/2023

01-12-2023 | Hypocalcemia | Research

Incidence and risk factors of hypoparathyroidism and hypocalcemia after hemithyroidectomy

Authors: Jae Yeong Jeong, Chang Myeon Song, Yong Bae Ji, Jung Hwan Park, Dong Sun Kim, Kyung Tae

Published in: Langenbeck's Archives of Surgery | Issue 1/2023

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Abstract

Purpose

The incidence and risk factors for hypoparathyroidism after total thyroidectomy is well-known. However, the characteristics of hypoparathyroidism and hypocalcemia after hemithyroidectomy have not been investigated well. In this study, we aimed to evaluate the incidence, characteristics, and risk factors of hypoparathyroidism and hypocalcemia after hemithyroidectomy.

Method

We retrospectively analyzed the medical data of 321 patients who underwent hemithyroidectomy, with or without central neck dissection, from January 2012 to April 2019. We analyzed the serum intact parathyroid hormone (iPTH), calcium, and ionized calcium (iCa) levels serially (preoperatively and postoperatively on the operation day; days 1 and 3; and months 1, 3, 6, and 12) and evaluated risk factors for postoperative hypoparathyroidism and hypocalcemia.

Results

The mean iPTH and calcium levels decreased significantly after hemithyroidectomy on the operation day and postoperative days 1 and 3, and returned to the preoperative level at the postoperative 1-month follow-up. The mean iCa level decreased significantly on the operation day and postoperative day 1. Transient hypoparathyroidism and transient hypocalcemia occurred in 16 (5%) and 250 (78%) participants, and they recovered to normal levels postoperatively by 1 month. Eight (2.5%) patients had mild symptoms of hypocalcemia necessitating oral calcium supplementation. No permanent hypoparathyroidism or hypocalcemia was observed. Preoperatively low serum iPTH and calcium levels were associated with transient hypoparathyroidism and hypocalcemia after hemithyroidectomy.

Conclusion

Approximately 5% and 2.5% of participants showed transient hypoparathyroidism and mild symptomatic hypocalcemia after hemithyroidectomy. The risk factors for transient hypoparathyroidism and hypocalcemia include preoperative low serum iPTH and calcium levels.
Literature
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Metadata
Title
Incidence and risk factors of hypoparathyroidism and hypocalcemia after hemithyroidectomy
Authors
Jae Yeong Jeong
Chang Myeon Song
Yong Bae Ji
Jung Hwan Park
Dong Sun Kim
Kyung Tae
Publication date
01-12-2023
Publisher
Springer Berlin Heidelberg
Published in
Langenbeck's Archives of Surgery / Issue 1/2023
Print ISSN: 1435-2443
Electronic ISSN: 1435-2451
DOI
https://doi.org/10.1007/s00423-023-03038-5

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