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  • Title: Ploidy and proliferation in human bladder tumors as measured by flow-cytofluorometric DNA-analysis and its relations to histopathology and cytology.
    Author: Tribukait B, Gustafson H, Esposti P.
    Journal: Cancer; 1979 May; 43(5):1742-51. PubMed ID: 445364.
    Abstract:
    Biopsies from bladder tumors of 41 patients were investigated by flow-cytofluorometric DNA analysis and compared with exfoliated cells. The degrees of ploidy and proliferation were determined. Good agreement was found between the degrees of ploidy and proliferation in the biopsies and the exfoliated cell material. Tumors Grade I-II were either euploid or aneuploid. All Grade III tumors were aneuploid. The S-phase fractions were about 6% in the diploid tumors and 17% with large variations in the aneuploid tumors. The histological grading was well correlated to the number of S-phase cells and the occurrence of aneuploidy. When the Grade II tumors were divided into two groups having lesser and more pronounced atypia, the two groups differed significantly with regard to their degrees of proliferation. In addition to aneuploidy as an important criterium for malignancy, the degree of proliferation appears to be of major biological significance.
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