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Incidental Diagnosis of Parathyroid Lesions by Preoperative Use of Next-Generation Molecular Testing.

Abstract：

BACKGROUND:Parathyroid glands can mimic thyroid follicular lesions on fine-needle aspiration (FNA) cytology and can lead to unnecessary or incorrect surgery. Newer molecular panel tests using next-generation sequencing (NGS) include analysis of cell type-specific gene expression profiles such as parathyroid. The study aim is to determine the frequency and clinical implications of parathyroid tissue identification by molecular testing in cytologically indeterminate "thyroid" lesions. METHODS:Molecular analysis of indeterminate thyroid FNA specimens is obtained routinely and relies on amplification-based NGS inclusive of PTH-specific expression profiles. For this study, we retrospectively examined the clinical data and management of patients with molecular results positive for PTH expression from May 2014 until May 2016. RESULTS:Among 4765 consecutive patients with indeterminate cytology for a presumed thyroid nodule, NGS instead indicated a parathyroid lesion in 20 patients (0.42%). The clinical data of 15 patients were available, and the subsequent clinical management was altered in 93% (14/15 patients), including five (33%) eucalcemic patients who could avoid unnecessary surgery. Primary hyperparathyroidism was not suspected in seven patients until the molecular analysis results, and primary hyperparathyroidism was diagnosed in one (14%). During parathyroid exploration, most patients (6/8, 75%) required concurrent thyroidectomy or lobectomy, but thyroid preservation was still possible in two patients. A parathyroid gland was histologically confirmed in 89%. CONCLUSIONS:In 0.42% of patients with indeterminate cytology results, next-generation molecular results will indicate the presence of a parathyroid lesion. When this occurs, it is accurate and can robustly impact clinical management (93%).

journal_name

World J Surg

journal_title

World journal of surgery

authors

Bo W,Schoedel KE,Carty SE,Radkay LA,Ohori NP,Nikiforov YE,Nikiforova MN,Yip L

doi

10.1007/s00268-018-4548-3

subject

Has Abstract

pub_date

2018-09-01 00:00:00

pages

2840-2845

issue

eissn

0364-2313

issn

1432-2323

pii

10.1007/s00268-018-4548-3

journal_volume

pub_type

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Incidental Diagnosis of Parathyroid Lesions by Preoperative Use of Next-Generation Molecular Testing.