Morphological changes induced by androgen blockade in normal prostate and prostatic carcinoma.

Area of Science:

• Urology
• Oncology
• Pathology

Background:

• Maximal androgen blockade (MAB) involves LHRH agonists and anti-androgens.
• MAB is known to induce significant morphologic changes in prostate tissue.

Purpose of the Study:

• To detail the morphologic changes in prostate cancer and normal tissue following MAB.
• To assess the impact of MAB on tumor characteristics and prostatic intraepithelial neoplasia (PIN).

Main Methods:

• Histological examination of prostate tissue after MAB treatment.
• Evaluation of tumor volume, density, capsular penetration, and surgical margins.

Main Results:

• MAB significantly reduces tumor volume, density, capsular penetration, and surgical margin involvement.
• Histology shows marked atrophy and shrinkage of normal and tumor prostate tissue; residual cancer cells can be sparse.
• MAB causes reversible changes in morphology and reduces PIN prevalence and extent.

Conclusions:

• MAB induces substantial, largely reversible, morphologic changes in the prostate, impacting tumor characteristics.
• Therapy-induced changes may obscure cancer cell identification and affect Gleason scoring; resistance can develop.
• MAB effectively reduces tumor burden and PIN, though monotherapy may yield comparable effects.