Objective:

To discuss the ultrasonic manifestations of renal oncocytoma and analyze the cause of misdiagnosis.

Methods:

The clinical data of one case with renal oncocytoma was analyzed retrospectively. The relative literatures were reviewed.

Results:

This case was hospitalized in Minhang Hospital

Fudan University

Shanghai

for physical examination. The routine sonography showed an ill-defined hyper-echoic lesion in the right kidney. A month later

contrast-enhanced ultrasound (CEUS) in a superior hospital found that the lesion's imaging manifestations were similar to that of a malignant renal tumor

and it was finally diagnosed as renal cell carcinoma. After surgery in Fudan University Shanghai Cancer Center

it was d

iagnosed as renal oncocytoma. No relapse occurred in the follow-up of six months.

Conclusion:

Renal oncocytoma is rare. As its imaging manifestations are similar to that of a malignant tumor

it is often misdiagnosed. The clinicians should fully understand this disease and complete diagnostic thinking to avoid and reduce misdiagnosis.