Papillary Renal Cell Cancer Is Strongly Associated with Simple Renal Cysts.

Introduction: The purpose of this study was to evaluate the prevalence of simple renal cysts (SRCs) in patients with renal neoplasia. Patients and Methods: The study population consisted of 482 patients who underwent partial or radical nephrectomy for kidney tumour between 2006 and 2010. Prevalence of cysts was evaluated retrospectively on a preoperative CT or MRI scan. Results: SRCs are more prevalent in patients with papillary renal cell cancer (RCC) than patients with clear cell RCC. All obese (BMI ≥30) patients in our study population had SRCs. Conclusions: This is the first study to show an association between SRCs and papillary RCC. Copyright © 2013 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]