Shear Wave Elastography in Patients with Primary and Secondary Hyperparathyroidism

Area of Science:

• Medical Imaging
• Endocrinology
• Elastography

Background:

• Hyperparathyroidism, a condition affecting calcium regulation, presents in primary and secondary forms.
• Accurate differentiation between these forms is crucial for effective patient management.
• Novel imaging techniques are needed to improve diagnostic capabilities.

Purpose of the Study:

• To determine the elastographic characteristics of primary and secondary hyperparathyroidism using shear wave elastography (SWE).
• To evaluate elastographic differences between primary and secondary hyperparathyroidism.
• To identify distinct elastographic values for parathyroid tissue compared to surrounding thyroid and muscle tissue.

Main Methods:

• A prospective study involving 68 patients with hyperparathyroidism (27 primary, 41 secondary).
• Shear wave elastography (SWE) was used to measure the elasticity index (EI) in parathyroid, thyroid, and muscle tissues.
• Elastographic values were compared between patient groups and tissue types.

Main Results:

• Significant elastographic differences were observed between primary (median SWE 4.86 kPa) and secondary hyperparathyroidism (median SWE 6.96 kPa) (p < 0.001).
• These differences remained significant after adjusting for parathormone (PTH) and vitamin D levels.
• Cutoff values for parathyroid adenoma and parathyroid tissue were identified as 5.96 kPa and 9.58 kPa, respectively.

Conclusions:

• Shear wave elastography (SWE) is a valuable tool for identifying parathyroid tissue in both primary and secondary hyperparathyroidism.
• Significant elastographic differences exist between parathyroid, thyroid, and muscle tissues.
• A global cutoff value of 9.58 kPa for parathyroid tissue was established, with noted differences between primary and secondary forms.