Prostatic-type polyps of the lower urinary tract: three histogenetic types?

Area of Science:

• Urology
• Pathology
• Histology

Background:

• Prostatic-type polyps are rare lower urinary tract lesions.
• These polyps occur exclusively in males across various age groups.

Purpose of the Study:

• To characterize the clinical presentation and histogenesis of prostatic-type polyps in different lower urinary tract locations.
• To investigate the immunohistochemical profile of these polyps.

Main Methods:

• Retrospective analysis of seventeen cases of prostatic-type polyps.
• Histopathological examination including immunostaining for prostatic-specific antigen.
• Correlation of polyp location with patient demographics and clinical presentation.

Main Results:

• Polyps were found in the ureteric orifice, bladder, and urethra with mean ages of 20.5, 60.2, and 36.6 years, respectively.
• Hematuria was the commonest presentation for ureteric orifice and bladder polyps; dysuria or hematuria for urethral polyps.
• Histology revealed prostatic acini and papillae lined by prostatic-type epithelium, often with overlying transitional epithelium.

Conclusions:

• The histogenesis of prostatic-type polyps likely varies by site: developmental for ureteric orifice, metaplastic for bladder, and hyperplastic for urethral polyps.
• Immunostaining for prostatic-specific antigen is crucial for diagnosis.
• Understanding the distinct origins aids in clinical management and prognosis.