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Pseudohydronephrosis on noncontrast computed tomography

E S Amis, J J Cronan, R C Pfister

    Journal of Computer Assisted Tomography
    |June 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    Noncontrast renal CT can misdiagnose kidney obstruction due to conditions like peripelvic cysts. Careful review of CT scans or further imaging is recommended for accurate diagnosis of renal obstruction.

    Area of Science:

    • Radiology
    • Nephrology
    • Urology

    Background:

    • Noncontrast computed tomography (CT) is frequently used to assess kidney function and identify potential obstructions.
    • However, certain conditions can mimic hydronephrosis on these scans, potentially leading to misdiagnosis.

    Purpose of the Study:

    • To highlight conditions that can mimic hydronephrosis on noncontrast renal CT.
    • To emphasize the importance of accurate diagnosis of renal obstruction.

    Main Methods:

    • Review of illustrative cases presenting conditions that mimic hydronephrosis on noncontrast renal CT.
    • Analysis of attenuation values and renal anatomy to differentiate true obstruction from mimics.

    Main Results:

    • Peripelvic cysts and subcapsular hematomas can present as false positives for renal obstruction on noncontrast renal CT.

    Related Experiment Videos

  • Attention to attenuation values and renal anatomy aids in differentiating these conditions.

    • Conclusions:

    • Noncontrast renal CT findings suggestive of hydronephrosis require careful evaluation.
    • Postcontrast imaging or alternative radiographic modalities may be necessary to confirm or exclude renal obstruction when findings are equivocal.