Δευτέρα 7 Δεκεμβρίου 2020

Factors related to a non‐localising technetium 99m sestamibi scan result during parathyroid adenoma imaging in primary hyperparathyroidism

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Abstract

Objectives

The aim of this study is to investigate factors that are associated with having a non‐localising 99mTc‐sestamibi scan.

Design

A retrospective study was performed on patients that underwent parathyroid surgery performed within a single institution between 2001 and 2018.

Setting

Single tertiary centre for parathyroid surgery.

Participants

230 patients underwent surgery for primary hyperparathyroidism due to a solitary parathyroid adenoma and had pre‐operative 99mTc‐sestamibi imaging.

Main outcome measures

Variables including age, gender, intra‐operative location of parathyroid adenoma, adenoma weight and pre‐ & post‐operative calcium and parathyroid hormone levels were investigated through univariate and multivariate analysis to identify any association with having a non‐localising (negative) 99mTc‐sestamibi scan result.

Results

Multivariate analysis identified that right‐sided adenomas (p=0.038), superior adenomas (p=0.042) and a lower pre‐operative PTH level (p=0.034) were all individual factors associated with having a negative 99mTc‐sestamibi scan result. Although the weight of the adenoma was significant on univariate analysis (p=0.029), this was not demonstrated on multivariate analysis (p=0.422).

Conclusion

Factors that were associated with having non‐localising 99mTc‐sestamibi scan were right‐sided adenomas, superior adenomas, and lower pre‐operative PTH level. Further large prospective multicentre studies are needed to further evaluate these initial findings.

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