Systematic Biopsy vs. Prostatectomy: Evaluating Correlations and Grading Discrepancies in Prostate Cancer

Area of Science:

• Uropathology
• Oncology
• Surgical Pathology

Background:

• Prostate cancer (PCa) is a growing global health concern.
• Accurate Gleason Score (GS) from preoperative biopsy is critical for PCa prognosis and patient management.
• Pathological features from biopsy impact treatment strategies.

Purpose of the Study:

• To investigate the correlation between prostate biopsy parameters and prostatectomy specimen pathological features.
• To identify factors contributing to tumor over- and under-grading in biopsy samples.

Main Methods:

• Retrospective study of 110 male patients with confirmed PCa.
• Analysis of biopsy and radical prostatectomy (RP) specimens using standard histopathological techniques.
• Statistical analysis performed using IBM SPSS Statistics.

Main Results:

• Tumoral length on biopsy correlated with positive surgical margin (r=0.289, p<0.01) and tumoral volume (r=0.526, p<0.001) on RP.
• Higher Gleason Grade Groups (GG) on biopsy increased the likelihood of extraprostatic extension (approx. 4x).
• Significant correlation found between Gleason Pattern 4 (%GP4) on biopsy and pT stage (pT4 showed highest %GP4).
• Undergrading occurred significantly more often (30.90%) than overgrading (6.36%) in biopsy samples.
• Greater tumor length and higher tumor percentages in biopsies improved grading accuracy (p<0.001).

Conclusions:

• Systemic biopsies are key predictors of pathological outcomes, with specific parameters serving as prognostic markers.
• The potential for biopsy under- or over-grading highlights the need for careful clinical consideration.
• Repeat biopsies or additional imaging techniques may enhance diagnostic precision for improved treatment strategies.