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. 2022 Feb 23;15(8):1459–1474. doi: 10.1093/ckj/sfac050

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© The Author(s) 2022. Published by Oxford University Press on behalf of the ERA.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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FIGURE 6: — (A) Ultrasound of the neck showing inferior parathyroid adenomas (roughly 1.16 × 0.69 cm) located behind the thyroid. The parathyroid adenoma appears as a well-circumscribed, oval mass, hypoechoic in comparison to the adjacent thyroid gland. Longitudinal (left) and transvers (right) scans. (B) An inferior parathyroid adenoma located behind the thyroid with color Doppler imaging (longitudinal scan). (C) Longitudinal scan demonstrating an inferior parathyroid adenoma located near the inferior pole of the thyroid lobe (left). The CEUS examination is characterized by a strong early contrast enhancement in the arterial phase beginning 15 s after the bolus injection (right). (D) CEUS time–intensity curves: the wash-in (arterial phase in the figure, 0–30 s after application of contrast agent) and wash out (venous phase, 30–120 s) of the adenomas (a), represented in the graph by the red line, compared with the thyroid gland (b), represented by the yellow line.