Bosniak classification version 2019: updated algorithms for the diagnosis of cystic renal masses

The classification of cystic renal masses according to computed tomography data, which allows to stratify them depending on the risk of malignancy, was created by M.A. Bosniak in 1986 and modified in 1994. Various groups of researchers have carried out meta-analysis based on the results of applying the proposed classification during the time that has passed since the publication of the last version. Taking into account the information received, which revealed a number of limitations and disadvantages of the previously used method for systematizing renal cystic masses, as well as in connection with the development of medical imaging methods, updated diagnostic algorithms were formulated, which served as the basis for the Bosniak 2019 classification. It is expected that the use of Bosniak 2019 will optimize stratification renal lesions of the cystic structure and reduce the number of removed benign tumors, can be used as a basis for the future research to further improve the classification and its congruence with the requirements of clinical specialists.