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Preoperative 11C-Methionine PET/CT Enables Focussed Parathyroidectomy in MIBI-SPECT Negative Parathyroid Adenoma

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Abstract

Background

Precise preoperative localization is essential for focussed parathyroidectomy. The imaging standard consists of cervical ultrasonography (cUS) and 99mTc-MIBI-SPECT (MIBI-SPECT). 11C-methionine positron emission tomography/computed tomography (Met-PET/CT) is a promising method for localizing parathyroid adenomas. The objective of our study was to elucidate whether additional Met-PET/CT increases the rate of focussed parathyroidectomy.

Methods

Fourteen patients with primary hyperparathyroidism (HPT) and three patients with tertiary HPT underwent cUS and MIBI-SPECT. Met-PET/CT was carried out in patients with negative MIBI results. Subsequent surgical strategy was adapted according to imaging results.

Results

cUS localized a single parathyroid adenoma in 10/17 patients (59 %), while MIBI-SPECT/CT identified 11/17 single adenomas (65 %). In the remaining six patients, Met-PET/CT identified five single adenomas. This step-up approach correctly identified single adenomas in 16/17 patients (94 %).

Conclusion

Met-PET/CT raises the rate of correctly localized single parathyroid adenomas in patients with negative cUS and MIBI-SPECT/CT and increases the number of focussed surgical approaches.

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Abbreviations

cUS:

Cervical ultrasound

MIBI:

Methoxy-isobutyl-isonitrile

MIBI-SPECT/CT:

Tc-99m sestamibi (MIBI)-scintigraphy with SPECT/CT

Met-PET/CT:

11C-methionine positron emission tomography/computed tomography

MIVAP:

Minimally video-assisted parathyroidectomy

OMIP:

Open minimally video-assisted parathyroidectomy

pHPT:

Primary hyperparathyroidism

sHPT:

Secondary hyperparathyroidism

tHPT:

Tertiary hyperparathyroidism

iPTH:

Intraoperative parathyroid hormone assay

R:

Right

L:

Left

N/A:

Not analyzed

n.d.:

No correct detection

TH:

Thoracic vertebra

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Correspondence to Christina Lenschow.

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Lenschow, C., Gassmann, P., Wenning, C. et al. Preoperative 11C-Methionine PET/CT Enables Focussed Parathyroidectomy in MIBI-SPECT Negative Parathyroid Adenoma. World J Surg 39, 1750–1757 (2015). https://doi.org/10.1007/s00268-015-2992-x

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