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Meta-Analysis
. 2019 Feb;404(1):63-70.
doi: 10.1007/s00423-019-01751-8. Epub 2019 Feb 14.

The prevalence and anatomy of parathyroid glands: a meta-analysis with implications for parathyroid surgery

Dominik Taterra  1   2 , Linda M Wong  1 , Jens Vikse  1   3 , Beatrice Sanna  1   4 , Przemysław Pękala  1   2 , Jerzy Walocha  1   2 , Roberto Cirocchi  5 , Krzysztof Tomaszewski  1   2 , Brandon Michael Henry  6
Affiliations
Meta-Analysis

The prevalence and anatomy of parathyroid glands: a meta-analysis with implications for parathyroid surgery

Dominik Taterra et al. Langenbecks Arch Surg. 2019 Feb.

Abstract

Purpose: The anatomy of parathyroid glands (PTG) is highly variable in the population. The aim of this study was to conduct a systematic analysis on the prevalence and location of PTG in healthy and hyperparathyroidism (HPT) patients.

Methods: An extensive search of the major electronic databases was conducted to identify all studies that reported relevant data on the number of PTG per patient and location of PTG. The data was extracted from the eligible studies and pooled into a meta-analysis.

Results: The overall analysis of 26 studies (n = 7005 patients; n = 23,519 PTG) on the number of PTG showed that 81.4% (95% CI 65.4-85.8) of patients have four PTG. A total of 15.9% of PTG are present in ectopic locations, with 11.6% (95% CI 5.1-19.1) in the neck and 4.3% (95% CI 0.7-9.9) in mediastinum. The subgroup analysis of ectopic PTG showed that 51.7% of ectopic PTG in the neck are localized in retroesophageal/paraesophageal space or in the thyroid gland. No significant differences were observed between the healthy and HPT patients and cadaveric and intraoperative studies.

Conclusions: Knowledge regarding the prevalence, location, and anatomy of PTG is essential for surgeons planning for and carrying out parathyroidectomies, as any unidentified PTG, either supernumerary or in ectopic location, can result in unsuccessful treatment and need for reoperation.

Keywords: Anatomy; Hyperparathyroidism; Meta-analysis; Parathyroid glands; Parathyroidectomy.

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Conflict of interest statement

Conflict of interest

The authors declare that they have no conflict of interest.

Figures

Fig. 1
Fig. 1
Anatomical relationships of parathyroid gland
Fig. 2
Fig. 2
Study identification flowchart
Fig. 3
Fig. 3
Forrest plot for overall pooled prevalence rate of patients with four parathyroid glands
See this image and copyright information in PMC

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