Abstract
Abstract Objective To investigate the gray-scale ultrasound and contrast-enhanced ultrasound (CEUS) features of metanephric adenoma (MA) to improve our understanding and diagnostic accuracy. Methods Contrast-enhanced ultrasound findings and clinical data of a patient with MA are reported. Results The possibility of renal malignancy was considered after CEUS and computed tomography. A left renal nephron-sparing operation was performed using an endoscope, and MA was confirmed via surgical pathology. Conclusion Preoperative diagnosis of MA is difficult because of atypical imaging findings. The possibility of MA should be considered when a renal mass is found, and CEUS shows a “slow-in, fast-out” enhancement pattern.
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