Accuracy of 4-Dimensional Computed Tomography for Localization in Primary Hyperparathyroidism

Area of Science:

• Endocrinology
• Surgical Oncology
• Radiology

Background:

• Primary hyperparathyroidism (PHP) is often caused by a single parathyroid adenoma.
• Accurate preoperative imaging is essential for targeted, minimally invasive parathyroidectomy.
• This study evaluates the diagnostic performance of various imaging modalities for PHP localization.

Purpose of the Study:

• To assess the accuracy of surgeon-performed ultrasound (US), four-dimensional computed tomography (4DCT), and sestamibi in localizing solitary parathyroid adenomas.
• To compare the sensitivity, specificity, and accuracy of these imaging techniques for guiding parathyroid surgery.

Main Methods:

• Retrospective review of 100 adult patients with PHP undergoing parathyroidectomy.
• Analysis of surgeon-performed US, 4DCT, and sestamibi for preoperative localization.
• Calculation of sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for each modality.

Main Results:

• Four-dimensional computed tomography (4DCT) demonstrated the highest accuracy (86%) in localizing parathyroid adenomas.
• Ultrasound (US) showed high specificity (94%) but lower accuracy (32%).
• Sestamibi had an accuracy of 70% in localizing adenomas.

Conclusions:

• Surgeon-performed ultrasound (US) is highly specific for preoperative localization of solitary parathyroid adenomas in PHP.
• Four-dimensional computed tomography (4DCT) is the most accurate imaging modality and is recommended for patients with non-localized US findings.