Sampling of radical prostatectomy specimens. How much is adequate?

Area of Science:

• Uropathology
• Surgical Pathology

Background:

• Accurate pathologic assessment of prostate glands is crucial for staging and prognosis of prostate cancer.
• Traditional whole mount sections provide detailed topographic display but are resource-intensive.

Purpose of the Study:

• To compare the diagnostic yield of whole mount serial sectioning versus alternate sectioning for evaluating prostate cancer specimens.
• To determine if alternate sectioning is a viable, resource-efficient alternative for routine pathologic examination.

Main Methods:

• Prostate glands from 52 patients with clinical stage B carcinoma were examined using two methods: whole mount serial sectioning and alternate sectioning.
• Pathologic features including tumor type, grade, Gleason score, multiplicity, and capsular penetration were assessed and compared between the two techniques.

Main Results:

• No significant differences in tumor type, grade, or Gleason score were detected between the two methods in 75% of cases.
• Alternate sectioning detected 85% of capsular penetration cases identified by serial sectioning.
• Minor discrepancies in multiplicity and Gleason score were occasionally noted, with two invasive foci missed by alternate sectioning impacting surgical margins.

Conclusions:

• Alternate sectioning is a reliable and resource-efficient method for the pathologic examination of clinically localized prostate cancer specimens.
• This technique provides comparable diagnostic accuracy to whole mount sections for key prognostic features.
• The findings support the adoption of alternate sectioning for routine pathologic evaluation, optimizing resource utilization.