The kidneys are a retro-peritoneal structure, protected by both ribs and musculature of the back. Percussion of the flanks in the lower rib cage can help discern pathological processes involving the kidneys, such as pyelonephritis or urolithiasis. Diagnostic evaluation of the kidney and urinary tract: https://go.amboss.com/USS-lsf Subscribe to AMBOSS YouTube for the latest clinical examination videos, medical student interviews, study tips and tricks, and live webinars! Free 5 Day Trial: https://go.amboss.com/amboss-YT Instagram: / amboss_med Facebook: / amboss.med Twitter: / ambossmed Blog: https://blog.amboss.com/us #PercussionOfTheKidneys #USMLE #AMBOSSMed