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Advances in Urology
Volume 2008, Article ID 758073, 7 pages
Review Article

Histological Characterisation of Small Renal Masses and Incidence of Silent Renal Masses

Department of Pathology, Instituto Valenciano de Oncología, 46009 Valencia, Spain

Received 28 May 2008; Revised 8 September 2008; Accepted 30 September 2008

Academic Editor: J. Rubio

Copyright © 2008 Sergio Almenar Medina and Ana Calatrava Fons. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


With the introduction of sonographic and CT examinations, the number of small renal masses detected has increased. Benign neoplastic lesions are usually smaller than 4 cm in size, whilst the most common types of renal cell carcinomas have a mean size greater than that, but we must not forget that a significant number of small masses are renal cell carcinomas; even though the rate of benign cases increases as the diameter of the lesions decreases, therefore, size itself cannot be used to rule out a diagnostic of malignancy and often image characteristics are not enough to predict the nature of the lesion with certainty. In this case, histological confirmation must be recommended. Ideally, the histological study must be conducted on the surgical specimen, even though biopsy can be an option in selected cases.