Method for procuring specific populations of viable human prostate cells for research

Area of Science:

• Urology
• Pathology
• Surgical Oncology

Background:

• Studying viable prostate tissue is crucial for research but hindered by difficulties in identifying cancer in unembedded samples.
• Current methods often rely on fixed or frozen tissues, limiting the scope of potential investigations.

Purpose of the Study:

• To evaluate a novel technique using a dissecting microscope and toluidine blue stain for identifying prostate cancer in viable tissue.
• To assess the diagnostic accuracy, sample viability, and impact on pathologic assessment of this new method.

Main Methods:

• Examined cross-sections of 25 prostatectomy specimens using a dissecting microscope after staining with 0.5% aqueous toluidine blue.
• Directed 4-mm punch biopsies to identified benign and malignant areas.
• Assessed diagnostic accuracy, tissue viability, and effect on final pathologic assessment.

Main Results:

• The dissecting microscope technique accurately identified carcinoma in 17 of 25 cross-sections (100% confirmation).
• Procurement of viable benign tissue was successful in 20 of 25 cases (85% accurate diagnosis).
• The technique facilitated identification of extraprostatic extension and positive margins in three cases.

Conclusions:

• Microscopic examination with toluidine blue staining is effective for identifying prostate cancer in viable tissue, overcoming a major research obstacle.
• The technique preserves tissue viability, allowing for a wider range of downstream research.
• This method aids accurate pathologic assessment and streamlines tissue procurement for research purposes.