27.01.2022 | Review Article–Urology
Ultrasonography findings for the diagnosis of renal oncocytoma
verfasst von:
Shengnan Zhao, Jiahong Shi, Ran Yang, Xiujuan Zhang, Wei Zhao, Zhixia Sun
Erschienen in:
Journal of Medical Ultrasonics
|
Ausgabe 2/2022
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Abstract
Renal oncocytomas are rare benign epithelial tumors of the kidney. However, they are easily misdiagnosed as renal cancers, resulting in unnecessary radical nephrectomy. This review summarizes the use of ultrasound for the diagnosis of renal oncocytomas. On two-dimensional grayscale ultrasound, renal oncocytomas appear as solid, well-defined, round or oval, and relatively isoechoic or slightly hyperechoic masses. On color Doppler flow imaging, the “spoke-wheel” sign is evident. On power Doppler flow imaging, renal oncocytomas show mixed penetrating and peripheral patterns. Renal oncocytomas usually appear as highly enhanced on contrast-enhanced ultrasound images, and irregular nonenhanced areas in larger tumors. This review will help sonographers recognize renal oncocytomas.