Renal Adenocarcinoma:Evaluation of Malignancy on a Cytologic Basis: A Comparative Cytologic and Histologic Study

From 47 cases of renal carcinoma puncture specimens were taken for cytologic examination and a comparison was made with the histologic picture of the surgical or autopsy specimens.The material was classified on both cytologic and histologic grounds according to a three-degree scale, namely highly, moderately and poorly differentiated.In addition, the cytologic classification was compared with that made according to a scale of malignancy proposed by Arner et al. (1965) for an evaluation of the prognosis.The study has shown that it is possible, with a large measure of reliability, to evaluate the degree of differentiation of renal carcinoma on the basis of cytologic findings on puncture specimens, and that the cytologic degree of differentiation provides a fairly accurate basis for a prognosis.