Volume-weighted mean nuclear volume. Is this new prognosticator comparable in different institutions?

Area of Science:

• Pathology
• Oncology
• Urology

Background:

• Histological grading is crucial for cancer diagnosis and prognosis.
• Subjective histological grading can lead to inter-observer variability.
• Objective quantitative methods like mean nuclear volume (MNV) may improve diagnostic consistency.

Purpose of the Study:

• To assess the comparability of mean nuclear volume (MNV) measurements obtained from different institutions.
• To validate MNV as a reliable quantitative biomarker for histological assessment.

Main Methods:

• Histologic slides from bladder tumor and prostate specimens were prepared at three hospitals (SPH, SMH, SCH).
• MNV was calculated from slides prepared at each institution and compared using linear regression and paired t-tests.
• Intraobserver and interobserver reproducibility of MNV estimates were also analyzed.

Main Results:

• High correlation coefficients (R = .966) were observed when comparing MNV values between institutions.
• No significant differences in MNV were found between hospitals.
• High reproducibility (R = .918 for intraobserver, R = .949 for interobserver) was demonstrated for MNV estimates.

Conclusions:

• MNV estimates are comparable across multiple institutions.
• MNV is a reliable quantitative metric that can support subjective histological grading.
• Standardization of MNV measurement can enhance diagnostic accuracy and consistency in pathology.