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Angiographic patterns in renal oncocytomas

M A Ambos, M A Bosniak, Q J Valensi

    Radiology
    |December 1, 1978
    PubMed
    Summary
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    Renal oncocytomas are benign kidney tumors identifiable by specific angiographic patterns. While these patterns suggest oncocytoma, renal cell carcinoma can mimic these findings.

    Area of Science:

    • Radiology
    • Oncology
    • Nephrology

    Background:

    • Renal oncocytomas are benign neoplasms originating from proximal tubular epithelial cells.
    • Radiographically, these tumors present as solid, vascular masses.
    • Distinguishing oncocytomas from renal cell carcinomas is crucial for appropriate patient management.

    Purpose of the Study:

    • To identify and characterize the classic angiographic findings of renal oncocytomas.
    • To compare these findings with those of renal cell carcinomas.
    • To enhance the diagnostic accuracy of differentiating benign oncocytomas from malignant renal cell carcinomas using angiography.

    Main Methods:

    • Retrospective review of angiograms from 13 confirmed cases of renal oncocytoma.
    • Comparison with angiographic findings from 155 cases of renal cell carcinoma.

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  • Analysis of specific angiographic features including spoke-wheel pattern, nephrogram homogeneity, and rim characteristics.

    • Main Results:

    • Classic angiographic findings for renal oncocytoma include a spoke-wheel pattern, homogeneous nephrogram, and a sharp, smooth rim.
    • A homogeneous blush and/or spoke-wheel pattern significantly increase the likelihood of an oncocytoma.
    • Renal cell carcinomas can exhibit any or all of the described classic oncocytoma findings, necessitating careful evaluation.

    Conclusions:

    • Specific angiographic features are highly suggestive of renal oncocytoma.
    • Angiography remains a valuable tool in the differential diagnosis of renal masses.
    • Overlap in angiographic findings between oncocytomas and renal cell carcinomas underscores the importance of experienced interpretation.