Abstract
– The most important prognostic factors in renal carcinoma are the stage and grade. World literature is full of information on new markers, the analysis of DNA with the cytofluorimetric method being foremost, as it allows the cell lines in the neoplasm to be assessed and at the same time the ploidy and cell cycle stages to be studied. We have found an excellent correlation between the ploidy and cell grade. After a preliminary study we can conclude that the method is easy to perform and to reproduce. The procedure is also interesting for retrospective studies which allow the pathologist to select the blocks to be examined, thereby avoiding those widely contaminated by hemorrhages or necrosis.
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