Carcinoma renal variedad sarcomatoide. Hematoxilina-eosina, MIB 1 y ploidía celular como factores pronósticos. Comentario

Between 1987 and 1997 our Service performed 115 nephrectomies on patients with renal cell carcinomas, seven of which presented sarcomatoid variant. In six of them, the tumor had exceeded the renal capsule. In the other one, the tumor was confined to the renal parenchyma, being this one in which progression of the disease wasn't noticed after the surgery. The cases were studied through cellular morphology in H-E stained slides, cellular ploidy with flow cytometry comparing, in retrospective style, the clinical evolution of this type of tumor. The utility of the applied methods as prognostic factors of disease was evaluated.