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    Korean J Urol. 2006 Feb;47(2):214-216. Korean.
    Published online Feb 28, 2006.
    https://doi.org/10.4111/kju.2006.47.2.214
    Copyright © 2006 The Korean Urological Association
    Case Report

    Inverted Papilloma in the Prostatic Urethra

    Jae Heon Kim, Kong Hee Lee, Seung Whan Doo, Min Sung Choi,1 Dong Hwa Lee,1 Ki Hyuck Moon, Yun Seob Song, and Young Ho Park
      • Department of Urology, Soonchunhyang University, College of Medicine, Seoul, Korea.
      • 1Department of Pathology, Soonchunhyang University, College of Medicine, Seoul, Korea.
    • Corresponding author (Email: yssong@hosp.sch.ac.kr )
    Received August 09, 2005; Accepted November 30, 2005.

    Abstract

    Inverted papilloma of the urinary tract is a rare finding, and it is almost benign in its histologic morphology and clinical behavior. Despite several published reports, the prognostic significance and potential clinical behavior of this malady remains unclear. The most commonly associated clinical symptoms are hematuria and obstruction of the urinary tract. Most inverted papillomas of urinary tract occur in the bladder and only rarely in the ureter, renal pelvis and urethra. We report here on one case of inverted papilloma in the prostatic urethra. This was diagnosed by transrectal ultrasonography and confirmed by its histology.

    Keywords
    Inverted papilloma; Urethra

    Figures

    Fig. 1
    Transrectal ultrasonography shows a small echogenic mass that originated from the prostatic urethra (white arrow). Several calcifications are identified in the right transition zone.

    Fig. 2
    Urethroscopy of the prostatic urethra shows a smooth, well marginated polypoid mass with white grayish color and stalks from the prostatic urethra above the verumontanum.

    Fig. 3
    The microscopic findings show that cords of tumor cells are oriented toward the lamina propria and there is an inverted pattern of growth with a festoon appearance. The tumor is covered with flat urothelial epithelium (H&E, ×100).

    Fig. 4
    The high power microscopic findings show proliferation of oval to spindle shaped tumor cells that lack atypia (H&E, ×200).

    References

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    MeSH Terms
    Hematuria
    Kidney Pelvis
    Papilloma, Inverted*
    Ultrasonography
    Ureter
    Urethra*
    Urinary Bladder
    Urinary Tract
    Metrics
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