[Utility of seriated sections in prostate biopsies]

Area of Science:

• Uropathology
• Oncology
• Histopathology

Background:

• Routine prostate specific antigen screening increases detection of focal prostate carcinomas and atypical small acini proliferation (ASAP).
• The optimal number of histological sections per prostate biopsy to detect these lesions remains undetermined.
• Accurate diagnosis is crucial for appropriate patient management and treatment decisions.

Purpose of the Study:

• To evaluate the impact of performing additional histological sections on the detection rate of focal prostate carcinomas and ASAP.
• To determine if increased sectioning improves diagnostic yield in prostate biopsies.
• To assess the clinical utility of enhanced sectioning protocols.

Main Methods:

• A retrospective review of 250 sextant prostate biopsies (2008-2011) was conducted.
• Each biopsy underwent original sectioning with three levels, plus three additional sections with three levels each (total 12 levels).
• Focal lesions were analyzed immunohistochemically, and findings were compared to a prior study of 1000 biopsies with single-section analysis.

Main Results:

• Sixteen focal lesions (6.4%) were identified, including seven focal carcinomas (2.8%) and nine ASAP cases (3.6%).
• This represents an increase in detection rates compared to a previous study (1.3% focal carcinoma, 2.9% ASAP).
• The enhanced sectioning protocol demonstrated a higher yield for detecting both focal carcinomas and ASAP.

Conclusions:

• Performing additional histological sections in prostate biopsies can increase the detection rate of focal carcinomas and ASAP.
• While beneficial for high-suspicion cases (e.g., young patients, prior ASAP history), widespread additional sectioning may present practical challenges.
• Targeted application of enhanced sectioning protocols could improve diagnostic accuracy in select patient populations.