What type of study is this?

This is a Case Report study (also classified as: Literature Review).

January 6, 2026Journal of Clinical Ultrasound0 citations

Contrast‐Enhanced Ultrasound Features of Metanephric Adenoma: A Case Report and Literature Review

GWGuojuan WangGansu Province Computing Center CYCi YinLanzhou University of Technology FNFang NieGansu Province Computing Center

Key Points

To highlight contrast-enhanced ultrasound features of metanephric adenoma and improve diagnostic accuracy.
Detailed case report of a 54-year-old male patient
Assessment of contrast-enhanced ultrasound findings at specific time points
Review of existing literature related to metanephric adenoma and imaging diagnosis.
The lesion displayed heterogeneous hypoenhancement at 15s after contrast injection.
Progressive enhancement noted, with reduced enhancement after 50s.
Insights gathered aim to enhance preoperative diagnostic accuracy of metanephric adenoma.

Abstract

ABSTRACT Metanephric adenoma (MA) is a rare primary renal epithelial tumor classified as a metanephric neoplasm. Its clinical symptoms and imaging features are non‐specific, making preoperative diagnosis challenging and often leading to misdiagnosis as renal cell carcinoma (RCC). This report details the contrast‐enhanced ultrasound (CEUS) findings of a 54‐year‐old male patient with a MA: 15 s after contrast agent injection, the lesion showed heterogeneous hypoenhancement, exhibiting progressive enhancement. The contrast agent began to fade at 50s, resulting in lower enhancement. Combined with a literature review, it aims to provide more comprehensive information for the imaging diagnosis of MA.

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