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. 2020 Nov 19;56(11):624. doi: 10.3390/medicina56110624

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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An 81-year-old patient with an unclear lesion in the right kidney incidentally detected in contrast-enhanced computed tomography (CT). (a) In native B-mode, an inhomogeneously hyperechoic lesion with a diameter of 2.5 cm could be registered (right picture, yellow arrow). In the corresponding contrast-enhanced CT scan (a, left picture, yellow arrow), the lesion presents hypodense with only low contrast-enhancement; (b) no major vascularization could be visualized in Doppler mode (right picture, red arrow). (c) CEUS shows a rapid hyperenhancement of the lesion (right picture, red arrow); (d) no wash-out in the late phase was registered (right picture, red arrow). The patient underwent partial nephrectomy, the results of the histopathological analysis revealed benign renal angiomyolipoma.