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Karyometry of Primary and Metastatic Malignant Melanoma: A Correlation with Cell Proliferation

We used computerized image analysis, immunohisto-chemistry, and the incorporation of tritiated thymidine to study the relationship between nuclear size and shape and the proliferation of malignant melanoma cells. A total of 30 nonulcerated primary malignant melanomas and 75 of their cutaneous metastases were considered. We found a positive relationship between (a) the 3H-TdR labeling indices and the thickness of the primary malignant melanoma; (b) the nuclear profile areas of primary lesions and their respective metastases; and (c) the size and regularity of the contours of the nuclei. We failed to find a relationship between 3H-TdR indices and the nuclear size of malignant melanoma cells.