Flow Cytometric Analysis of Small Renal Tumors

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Abstract
Flow cytometric deoxyribonucleic acid (DNA) content analysis was performed on 26 renal tumors 3.0 cm. or less in maximum diameter. We noted DNA aneuploid cell populations in 8 of 25 tumors (32%) evaluable for DNA ploidy status. DNA aneuploid cells comprised 7 to 59% of the cells in those tumors. In comparison, 12 of 25 tumors (48%) larger than 3.0 cm. had aneuploid cell populations. S phase cell populations were significantly increased in the small aneuploid tumors compared with the small diploid tumors (p < 0.001). We believe that these small tumors have the potential to behave aggressively and, therefore, they should be treated no differently than larger renal neoplasms.