The natural history of large renal masses followed on observation

The safety and feasibility of active surveillance in comorbid patients with renal masses ≥4.0 cm is uncertain. The aim of this study is to describe our institutional experience with the observation of large renal masses. One hundred patients were identified with renal masses ≥ 4.0 cm that were followed on observation for at least 6 months without surgical intervention between 1994 and 2016. Linear regression was conducted to determine predictors...