Rare Tumours of the Kidney - Cystic Tumours of the Kidney

Aim: To quantify the occurrence of cystic tumours of the kidney in a population of patients with tumour of the kidney. Other goals of this study were to compare results of imaging studies with the results of final histology, to evaluate malignity rate in each Bosniak group and to evaluate the options of surgical treatment of cystic tumours of the kidney. The emphasis was placed to determine the benefits of magnetic resonance imaging in the diagnostic algorithm of cystic tumours of the kidney. Material and methods: All patients, who underwent surgery for the tumour of the kidney or cystic lesion of the kidney at our department in the time period 2009-17 were evaluated and patients with radiologically described cystic lesion of the kidney were included in the cohort. Lesions were classified according to CT imaging in the Bosniak categories. The unclear findings were in clinical study consulted with the radiologist. In case of uncertainties, MRI was indicated. Histological classification of all neoplasias was done according to the WHO classification 2016. The cohort of cystic lesions (n=247) was stratified into two groups. Categories Bosniak I-IIF (n=115), which were treated surgically not for suspicion of the malignity, but because of the size, localisation, clinical manifestation or were solved..