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Does thyroid-sparing total laryngectomy decrease the risk of hypothyroidism?

Published online by Cambridge University Press:  27 November 2020

G Viljoen*
Affiliation:
Division of Otorhinolaryngology, Faculty of Health Sciences, University of Cape Town, South Africa
J K McGuire
Affiliation:
Division of Otorhinolaryngology, Faculty of Health Sciences, University of Cape Town, South Africa
A Alhadad
Affiliation:
Division of Otorhinolaryngology, Faculty of Health Sciences, University of Cape Town, South Africa
S Dalvie
Affiliation:
Division of Radiation Oncology, Faculty of Health Sciences, University of Cape Town, South Africa
J J Fagan
Affiliation:
Division of Otorhinolaryngology, Faculty of Health Sciences, University of Cape Town, South Africa
*
Author for correspondence: Dr Gerrit Viljoen, Division of Otorhinolaryngology, Faculty of Health Sciences, University of Cape Town, Cape Town 7700, South Africa E-mail: dr.gerrit.viljoen@gmail.com

Abstract

Background

Thyroid lobectomy is recommended with total laryngectomy for laryngeal cancer in the National Comprehensive Cancer Network (‘NCCN’) guidelines. However, it is associated with a 32–89 per cent risk of hypothyroidism, with or without adjuvant radiotherapy.

Objective

The study aimed to determine whether preserving the whole thyroid, compared to a single lobe, does indeed significantly lower the incidence of hypothyroidism in the setting of total laryngectomy.

Method

A retrospective study was conducted at Groote Schuur Hospital in Cape Town, South Africa.

Results

Eighty-four patients met the inclusion criteria. The overall incidence of hypothyroidism was 45.2 per cent. The incidence of hypothyroidism was significantly reduced in patients who underwent thyroid-sparing total laryngectomy compared to hemithyroidectomy (p = 0.037). Adjuvant radiotherapy was associated with a higher incidence of hypothyroidism (p = 0.001).

Conclusion

Thyroid-preserving laryngectomy should be advocated in carefully selected patients with advanced laryngeal carcinoma, as it reduces the incidence of hypothyroidism.

Information

Type
Main Articles
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press

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