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Related Experiment Videos

Renal oncocytoma: new observations.

M J Quinn, D S Hartman, A C Friedman

    Radiology
    |October 1, 1984
    PubMed
    Summary

    Differentiating benign renal oncocytomas from malignant renal cell carcinoma preoperatively is crucial. Identifying a central scar on imaging, particularly CT and ultrasound, can suggest oncocytoma, aiding in treatment decisions.

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    Area of Science:

    • Urology
    • Radiology
    • Oncology

    Background:

    • Renal oncocytomas are benign tumors requiring different treatment than malignant renal cell carcinoma.
    • Accurate preoperative differentiation between these two conditions is clinically significant.

    Purpose of the Study:

    • To evaluate imaging findings that differentiate renal oncocytomas from renal cell carcinoma.
    • To establish reliable imaging criteria for preoperative diagnosis.

    Main Methods:

    • Retrospective review of radiographic studies (CT, sonography, angiography) for 18 pathologically confirmed renal oncocytomas.
    • Comparison with imaging findings from 18 cases of renal cell carcinoma.

    Main Results:

    • A central scar, identified on ultrasound (US) and CT, was a frequent finding in oncocytomas.

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  • A spoke-wheel pattern and homogeneous blush on angiography suggested oncocytoma when no scar was visible.
  • These criteria, applicable to masses ≥3 cm, correctly identified 16/18 oncocytomas.

    • Conclusions:

    • Imaging features, including a central scar on US/CT and specific angiographic findings, can aid in differentiating renal oncocytomas from renal cell carcinoma.
    • These diagnostic criteria are reliable for masses larger than 3 cm, improving preoperative diagnosis.