Correlation of gross morphologic features with histologic features in radical prostatectomy specimens

Area of Science:

• Uropathology
• Surgical Pathology
• Oncology

Background:

• Prostatic adenocarcinoma gross features can be subtle, and their histologic correlates require detailed examination.
• Accurate gross assessment is crucial for staging and treatment planning.

Purpose of the Study:

• To correlate gross findings of radical prostatectomy specimens with histologic examination.
• To determine the accuracy of gross inspection in identifying prostatic adenocarcinoma and its association with tumor characteristics.

Main Methods:

• Examination of 211 radical prostatectomy specimens.
• Correlation of gross findings with detailed histologic examination.
• Analysis of tumor stage, grade (Gleason score), and size based on gross appearance.

Main Results:

• No gross lesion was apparent in 22.3%, a subtle lesion in 37.0%, and a definite lesion in 40.8% of specimens.
• Tumor was identified grossly in 64% of subtle lesions and 96% of definite lesions, with an overall 63% accuracy for prostatic adenocarcinoma.
• Definite lesions were associated with higher stage (T3+), higher grade, and larger tumor size compared to subtle or no lesions.
• Extraprostatic extension and positive margins were identified in 54% and 46% of grossly identified lesions, respectively.
• False-positive rate for gross inspection was 19%.

Conclusions:

• Gross inspection of prostatectomy specimens can accurately identify prostatic adenocarcinoma in 63% of cases.
• The presence of an identifiable gross lesion correlates with increased tumor stage, grade, and size.
• While gross inspection aids in detection, histologic examination remains essential for definitive staging and margin assessment.