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The layered pyelogram in hydronephrosis.

B Umerah

    The British Journal of Radiology
    |December 1, 1975
    PubMed
    Summary

    The layered pyelogram, a finding on erect excretory urography films, is a sensitive sign for diagnosing hydronephrosis. This technique can reveal the condition even when routine imaging is inconclusive.

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    Area of Science:

    • Radiology
    • Urology
    • Nephrology

    Background:

    • Hydronephrosis diagnosis relies on excretory urography.
    • Subtle signs of hydronephrosis can be missed on standard imaging.
    • The layered pyelogram is an underutilized sign.

    Purpose of the Study:

    • To evaluate the diagnostic utility of the layered pyelogram in hydronephrosis.
    • To determine the sensitivity of this sign in detecting hydronephrosis.

    Main Methods:

    • Fifty patients underwent excretory urography with erect films.
    • Thirty hydronephrotic kidneys were analyzed for contrast medium layering in dilated calyces.

    Main Results:

    • A layered pyelogram was observed in 29 out of 30 hydronephrotic kidneys.
    • This sign was evident even when routine films or tomographs showed no discernible pyelogram.

    Conclusions:

    • The layered pyelogram is a simple and sensitive indicator of hydronephrosis.
    • Erect films are crucial for diagnosing hydronephrosis, especially in cases of poor contrast excretion.

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