Korean J Urol.  2006 Feb;47(2):214-216. 10.4111/kju.2006.47.2.214.

Inverted Papilloma in the Prostatic Urethra

• Kim JH
• Lee KH
• Doo SW
• Choi MS
• Lee DH
• Moon KH
• Song YS
• Park YH

• KMID: 2294205
• DOI: http://doi.org/10.4111/kju.2006.47.2.214

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.

Keyword

Inverted papilloma; Urethra

MeSH Terms

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

Figure

• 

  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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