Papillary renal cell cancer is strongly associated with simple renal cysts.
BACKGROUND
The purpose of this study was to evaluate the prevalence of simple renal cysts (SRCs) in patients with renal neoplasia.


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.
Department of Urology, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland.
Harri
H
Visapää
Esko
E
Glücker
Jari
J
Haukka
Kimmo
K
Taari
Harry
H
Nisen
D000328:Adult; D000368:Aged; D015992:Body Mass Index; D002292:Carcinoma, Renal Cell / Q000150:complications* / Q000628:therapy*; D005260:Female; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000150:complications / Q000175:diagnosis*; D007680:Kidney Neoplasms / Q000150:complications* / Q000628:therapy*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009392:Nephrectomy; D009765:Obesity / Q000150:complications; D015995:Prevalence; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed