Pathologic comparison of laparoscopic versus open radical retropubic prostatectomy specimens

Area of Science:

• Urology
• Surgical Pathology
• Oncology

Background:

• Radical prostatectomy is a primary treatment for localized prostate cancer.
• Comparing surgical techniques like laparoscopic radical prostatectomy (LRP) and open radical retropubic prostatectomy (RRP) is crucial for optimizing patient outcomes.
• Pathologic evaluation of surgical specimens provides critical data on cancer extent and treatment effectiveness.

Purpose of the Study:

• To compare the pathologic findings of laparoscopic radical prostatectomy (LRP) specimens with open radical retropubic prostatectomy (RRP) specimens.
• To assess differences in positive margin rates, including apex and multiple-site margins, between LRP and RRP.
• To evaluate stage and grade-matched cohorts to ensure a robust comparison.

Main Methods:

• Pathologic evaluation of 60 sequential LRP specimens.
• Comparison with 60 sequential RRP specimens and 60 stage and grade-matched RRP specimens.
• Exclusion of patients receiving neoadjuvant hormonal therapy or with nodal metastases to standardize cohorts.

Main Results:

• Specimen weight and preoperative PSA were similar across all cohorts.
• Approximately 75% of patients in each cohort were clinical Stage T1c.
• Overall positive inked margin rates were similar (16.9% for LRP vs. 20% for RRP).
• LRP showed a significantly lower rate of positive apex margins (3 vs. 7) and multiple positive margin sites (0 vs. 5-6).

Conclusions:

• Pathologic evaluation indicates comparable overall positive margin rates between LRP and RRP in patients not receiving neoadjuvant hormonal therapy.
• Laparoscopic radical prostatectomy (LRP) demonstrates an advantage with a lower incidence of positive apex and multiple-site margins.
• These findings suggest potential benefits of LRP in achieving more complete surgical resection margins.