Factors that predict growth kinetics in solid small renal masses (<4cm) on active surveillance.

Growth trajectory as assessed by change in size on cross-sectional imaging is considered as a surrogate marker for malignancy and aggressiveness in small renal masses (SRMs). This remains poorly understood, however. The study was aimed at finding out factors which can influence growth of SRMs in patients opting for active surveillance in a population of a region in the United Kingdom.