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Kim, Lee, Doo, Choi, Lee, Moon, Song, and Park: Inverted Papilloma in the Prostatic Urethra
Case Report
Korean Journal of Urology

Korean Journal of Urology 2006; 47(2): 214-216.

Published online: 28 February 2006

DOI: https://doi.org/10.4111/kju.2006.47.2.214

Inverted Papilloma in the Prostatic Urethra

Jae Heon Kim, Kong Hee Lee, Seung Whan Doo, Min Sung Choi1, Dong Hwa Lee1, Ki Hyuck Moon, Yun Seob Song, 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 (yssong@hosp.sch.ac.kr)

Received 9 August 2005       Accepted 30 November 2005

Copyright © 2006 The Korean Urological Association

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 and Tables

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