The morphologic changes induced by hormone and radiation therapy on prostate carcinoma

Area of Science:

• Urology
• Pathology
• Oncology

Background:

• Prostate carcinoma treatment often involves hormone and radiation therapy.
• Understanding treatment-induced morphologic changes is crucial for patient management.
• Residual disease evaluation requires knowledge of therapeutic effects on tissue.

Purpose of the Study:

• To evaluate morphologic changes in prostate cancer after hormone and radiation therapy.
• To differentiate treatment effects in nonmalignant and malignant prostate tissues.
• To correlate observed changes with treatment outcomes, such as PSA levels.

Main Methods:

• Analysis of prostate biopsy and prostatectomy specimens.
• Histopathological examination of nonmalignant and malignant prostatic tissues.
• Comparison of changes induced by hormone therapy versus radiation therapy.

Main Results:

• Hormone therapy caused atrophy, fibrosis, basal cell hyperplasia, and decreased high-grade intraepithelial neoplasia (HGPIN).
• Residual carcinoma showed squamous metaplasia, necrosis, vacuolization, and altered Gleason scores.
• Radiation therapy led to atrophic acini, squamous metaplasia, atypical glands, and architectural changes correlated with PSA reduction.

Conclusions:

• Both hormone and radiation therapy induce significant, distinct morphologic alterations in prostate cancer.
• These changes affect both tumor and surrounding nonmalignant tissues.
• Radiation therapy-induced changes correlate with a decrease in prostate-specific antigen (PSA).