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Ectopic prostatic tissue: histogenesis and histopathological characteristics.

Shams Halat¹, John N Eble, David J Grignon

¹Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA.

|March 29, 2011

Summary

Ectopic prostatic tissue in the lower urinary tract, typically the bladder or urethra, shares histological and immunohistochemical features with normal prostate tissue. This finding suggests it may arise from persistent embryonic structures.

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Area of Science:

Urology
Pathology
Histology

Background:

Ectopic prostatic tissue is an uncommon finding in the lower urinary tract.
Understanding its characteristics is crucial for accurate diagnosis and management.

Purpose of the Study:

To investigate the histological and immunohistochemical profile of ectopic prostatic tissue.
To compare these characteristics with normal prostatic tissue.

Main Methods:

Analysis of 20 cases of ectopic prostate tissue.
Histological examination and immunohistochemical staining for specific markers (PSA, PSAP, prostein, 34βE12, p63, CD10, cytokeratin 18).

Main Results:

Ectopic prostate tissue most frequently found in the bladder (85%) and urethra (15%).
Immunohistochemical markers confirmed prostatic origin and presence of basal cells.
No significant inflammation or reactive changes in adjacent tissues in most cases.
No evidence of residual/recurrent tissue or adenocarcinoma development in follow-up.

Conclusions:

Ectopic prostatic tissue exhibits histological and immunohistochemical features identical to orthotopic prostate tissue.
It is most commonly found in the bladder and urethra.
Likely represents the persistence of embryonic developmental remnants.