E1573. A Review of the 2019 Bosniak Classification for Renal Cysts
  1. Divya Nayar; University of Arkansas for Medical Sciences
  2. Suryansh Bajaj; University of Arkansas for Medical Sciences
Cystic lesions in the kidney are common occurrences and it is important to differentiate the benign cysts from the malignant lesions on the basis of radiological imaging. For this purpose, Dr. Morton A Bosniak proposed a classification system for different renal cystic lesions in 1986 on the basis of the imaging characteristics on CT. The original classification has been revised multiple times with the advances in imaging techniques. This purpose of this exhibit is to give a detailed review of the latest 2019 version of the Bosniak classification for renal cysts.

Educational Goals / Teaching Points
This exhibit will discuss limitations of the prior versions, goals of the 2019 version, 2019 Bosniak classification - types 1-4 with details imaging features, definitions of the standardized terminology used in the classification, limitations of the 2019 version, and future directions.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
Modification in the 2019 version include and define MRI imaging features into the classification, describes specific definitions and descriptions for different imaging features, incorporates clinically relevant and equivocal renal lesions for standardizing the management, and avoids unnecessary surgical procedures by placing a wide variety of cystic lesions in the lower classes.

The 2019 version of the Bosniak classification is crucial especially since it includes MRI features of cysts for the first time. This exhibit will review the imaging features and clinical use of the latest version.