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Improved nuclear contour indices for lymphoid morphometry.

R J Pelstring¹, S H Swerdlow

¹Department of Pathology and Laboratory Medicine, University of Cincinnati College of Medicine, Ohio 45267-0529.

Analytical and Quantitative Cytology and Histology

|December 1, 1987

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New nuclear shape factors improve the morphometric analysis of lymphoid cells. These indices accurately measure nuclear ellipticity and irregularity, enhancing the distinction between benign and neoplastic proliferations.

Area of Science:

Morphological analysis
Cellular biology
Hematopathology

Background:

Accurate morphometric analysis of lymphoid cells is crucial for diagnosing benign and neoplastic proliferations.
Existing nuclear shape factors, like the nuclear contour index (NCI), struggle to differentiate true nuclear irregularity from simple elongation.

Purpose of the Study:

To introduce and validate two novel nuclear shape factors: NCI of the ellipse (NCIe) for ellipticity and NCI of nuclear irregularity (NCIni) for perimeter complexity.
To assess the utility of NCIe and NCIni in distinguishing nuclear shape characteristics in lymphoid cells.

Main Methods:

A variation of the standard NCI was developed, calculating NCIe and NCIni separately.
These new indices were tested on geometric shapes and on mantle and follicular-center cells from tonsil biopsies.

Related Experiment Videos

Comparison of NCI, NCIe, and NCIni responses to varying degrees of ellipticity and irregularity.

Main Results:

NCIe correlated with nuclear elongation, while NCIni correlated with nuclear perimeter irregularity, independent of elongation.
Mantle and follicular-center cell nuclei exhibited higher mean NCIe and NCIni values than round nuclei, indicating both ellipticity and irregularity.
NCIe and NCIni varied independently in lymphoid cells, demonstrating their distinct measures of nuclear shape.

Conclusions:

The proposed NCIe and NCIni provide a more accurate and nuanced morphometric description of lymphoid cell nuclei.
These indices can better differentiate nuclear shapes, aiding in the precise characterization of lymphoid cell populations.