Quantitative study of KI-67 antibody staining in non-Hodgkin's lymphomas using image analysis

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Malignant lymphomas (ML) require accurate assessment of proliferative activity for grading and treatment.
• Quantifying proliferation is crucial for differentiating ML subtypes and predicting outcomes.
• Traditional manual cell counting can be time-consuming and subjective.

Purpose of the Study:

• To evaluate the reliability of image analysis for quantifying KI-67 proliferation in ML.
• To compare KI-67 area percentage with manual cell counting methods.
• To assess the utility of KI-67 area percentage in ML classification.

Main Methods:

• Analysis of KI-67 stained sections from 32 B-cell malignant lymphomas.
• Comparison of total KI-67 stained area percentage with the number of KI-67 positive cells.
• Statistical analysis using Pearson correlation and comparison of mean values between grades.

Main Results:

• A high correlation (r = .93) was observed between KI-67 area percentage and positive cell counts.
• Significant differences in KI-67 area percentage were found between low- and high-grade ML (Kiel classification).
• Follicular ML showed a wide range of KI-67 values, with follicular areas comparable to high-grade ML.

Conclusions:

• KI-67 area percentage determined by image analysis is a reliable alternative to manual cell counting for assessing ML proliferation.
• Image analysis provides quicker measurements over larger lymphomatous areas, increasing cell count accuracy.
• This method supports more efficient and accurate grading of malignant lymphomas.